subject:(Computed tomography)

Wake Forest University

1. Lillie, Elizabeth Marie. Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex.

Degree: 2014, Wake Forest University

► It is estimated there are 1.7 million cases of traumatic brain injuries (TBI) each year where falls and motor vehicle crashes (MVCs) are the number… (more)

Subjects/Keywords: Computed Tomography

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APA (6^th Edition):

Lillie, E. M. (2014). Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/39320

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lillie, Elizabeth Marie. “Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex.” 2014. Thesis, Wake Forest University. Accessed March 01, 2021. http://hdl.handle.net/10339/39320.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lillie, Elizabeth Marie. “Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex.” 2014. Web. 01 Mar 2021.

Vancouver:

Lillie EM. Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex. [Internet] [Thesis]. Wake Forest University; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10339/39320.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lillie EM. Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex. [Thesis]. Wake Forest University; 2014. Available from: http://hdl.handle.net/10339/39320

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wake Forest University

2. Walb, Matthew Charles. Low Dose Dosimetry and Radiation Response in Rodent Models.

Degree: 2016, Wake Forest University

URL: http://hdl.handle.net/10339/59295

► Exposure to ionizing radiation from diagnostic imaging procedures has dramatically increased in the last three decades. Computed tomography is a powerful and invaluable diagnostic imaging… (more)

Subjects/Keywords: computed tomography

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APA (6^th Edition):

Walb, M. C. (2016). Low Dose Dosimetry and Radiation Response in Rodent Models. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/59295

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Walb, Matthew Charles. “Low Dose Dosimetry and Radiation Response in Rodent Models.” 2016. Thesis, Wake Forest University. Accessed March 01, 2021. http://hdl.handle.net/10339/59295.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Walb, Matthew Charles. “Low Dose Dosimetry and Radiation Response in Rodent Models.” 2016. Web. 01 Mar 2021.

Vancouver:

Walb MC. Low Dose Dosimetry and Radiation Response in Rodent Models. [Internet] [Thesis]. Wake Forest University; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10339/59295.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Walb MC. Low Dose Dosimetry and Radiation Response in Rodent Models. [Thesis]. Wake Forest University; 2016. Available from: http://hdl.handle.net/10339/59295

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

3. Delgado, Diana (Diana Carolina). Iterative reconstruction methods of CT images using a statistical framework.

Degree: MS, Electrical and Computer Engineering, 2010, Oregon State University

URL: http://hdl.handle.net/1957/16368

► Medical imaging technologies play a vital role in early diagnosis of disease by providing internal images of the human body to medical professionals. Computed Tomography… (more)

Subjects/Keywords: Computed Tomography (CT); Tomography

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APA (6^th Edition):

Delgado, D. (. C. (2010). Iterative reconstruction methods of CT images using a statistical framework. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/16368

Chicago Manual of Style (16^th Edition):

Delgado, Diana (Diana Carolina). “Iterative reconstruction methods of CT images using a statistical framework.” 2010. Masters Thesis, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/16368.

MLA Handbook (7^th Edition):

Delgado, Diana (Diana Carolina). “Iterative reconstruction methods of CT images using a statistical framework.” 2010. Web. 01 Mar 2021.

Vancouver:

Delgado D(C. Iterative reconstruction methods of CT images using a statistical framework. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/16368.

Council of Science Editors:

Delgado D(C. Iterative reconstruction methods of CT images using a statistical framework. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/16368

Baylor University

4. McCarty, Sarah Anne, 1994-. Development of the particle technology research portfolio online reporting tool.

Degree: M.S.E.C.E., Baylor University. Dept. of Electrical & Computer Engineering., 2017, Baylor University

URL: http://hdl.handle.net/2104/10055

► Baylor University is part of the Particle Computed Tomography (pCT) Research Collective which performs research in medical imaging using protons and other particles to quickly… (more)

Subjects/Keywords: Particle Computed Tomography.

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APA (6^th Edition):

McCarty, Sarah Anne, 1. (2017). Development of the particle technology research portfolio online reporting tool. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/10055

Chicago Manual of Style (16^th Edition):

McCarty, Sarah Anne, 1994-. “Development of the particle technology research portfolio online reporting tool.” 2017. Masters Thesis, Baylor University. Accessed March 01, 2021. http://hdl.handle.net/2104/10055.

MLA Handbook (7^th Edition):

McCarty, Sarah Anne, 1994-. “Development of the particle technology research portfolio online reporting tool.” 2017. Web. 01 Mar 2021.

Vancouver:

McCarty, Sarah Anne 1. Development of the particle technology research portfolio online reporting tool. [Internet] [Masters thesis]. Baylor University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2104/10055.

Council of Science Editors:

McCarty, Sarah Anne 1. Development of the particle technology research portfolio online reporting tool. [Masters Thesis]. Baylor University; 2017. Available from: http://hdl.handle.net/2104/10055

University of Alberta

5. Lemieux, Genevieve. Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography.

Degree: MS, Medical Sciences-Orthodontics, 2014, University of Alberta

URL: https://era.library.ualberta.ca/files/kh04dr22t

► Introduction: Cone beam computed tomography (CBCT) is a new diagnostic and treatment planning tool in orthodontics. The purpose of this thesis is to determine precise… (more)

Subjects/Keywords: superimposition; cone beam computed tomography

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APA (6^th Edition):

Lemieux, G. (2014). Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/kh04dr22t

Chicago Manual of Style (16^th Edition):

Lemieux, Genevieve. “Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography.” 2014. Masters Thesis, University of Alberta. Accessed March 01, 2021. https://era.library.ualberta.ca/files/kh04dr22t.

MLA Handbook (7^th Edition):

Lemieux, Genevieve. “Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography.” 2014. Web. 01 Mar 2021.

Vancouver:

Lemieux G. Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Mar 01]. Available from: https://era.library.ualberta.ca/files/kh04dr22t.

Council of Science Editors:

Lemieux G. Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/kh04dr22t

Oregon State University

6. Wongsason, Patcharee. 3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve.

Degree: PhD, Mathematics, 2014, Oregon State University

URL: http://hdl.handle.net/1957/51754

► 3D vector tomography has been explored and results have been achieved in the last few decades. Among these was a reconstruction formula for the solenoidal… (more)

Subjects/Keywords: Spiral computed tomography – Mathematical models

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APA (6^th Edition):

Wongsason, P. (2014). 3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/51754

Chicago Manual of Style (16^th Edition):

Wongsason, Patcharee. “3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve.” 2014. Doctoral Dissertation, Oregon State University. Accessed March 01, 2021. http://hdl.handle.net/1957/51754.

MLA Handbook (7^th Edition):

Wongsason, Patcharee. “3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve.” 2014. Web. 01 Mar 2021.

Vancouver:

Wongsason P. 3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve. [Internet] [Doctoral dissertation]. Oregon State University; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1957/51754.

Council of Science Editors:

Wongsason P. 3D cone beam reconstruction formulas for the transverse-ray transform with source points on a curve. [Doctoral Dissertation]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/51754

Anna University

7. Padma A. Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;.

Degree: Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/33713

►

Over the last thirty years there has been an explosion in our newlineknowledge of the biochemical machinery of the nervous system In the last few… (more)

Subjects/Keywords: Computed Tomography; Magnetic Resonance Imaging

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APA (6^th Edition):

A, P. (2015). Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/33713

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

A, Padma. “Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;.” 2015. Thesis, Anna University. Accessed March 01, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/33713.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

A, Padma. “Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;.” 2015. Web. 01 Mar 2021.

Vancouver:

A P. Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Mar 01]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/33713.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

A P. Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/33713

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

8. Lee, Chung-Hao. PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA.

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/11694

► Capillarity, gravity and viscous forces control the fluids migration in geologic formations. However, experimental working addressing the simultaneous action of these driving forces as well… (more)

▼ Capillarity, gravity and viscous forces control the fluids migration in geologic formations. However, experimental working addressing the simultaneous action of these driving forces as well as the impact of injection flow rate in fractured porous media is limited. Understanding how these variables affect fracture-matrix transfer mechanisms and invasion front evolution in fractured rocks are of crucial importance to modeling and prediction of multiphase ground flow. This study addresses the simultaneous influence of fracture orientation, rock and fluid properties, and flowing conditions on multiphase flow in fractured permeable media at laboratory scale. Displacement of a non-wetting phase (gas or liquid) by capillary imbibition was monitored using X-ray computed tomography (CT). Results were then mimicked using an automated history matching approach to obtain representative relative permeability and capillary pressure curves to further investigate the impact of matrix homogeneity/heterogeneity and boundary shape on the response of the imbibition front. Sensitive analyses, in combination with direct experimental observation, allowed us to explore relative importance of relative permeability and capillary pressure curves to saturation distribution and imbibing font evolution. Experimental observations combined with simulation results indicated the impact of fracture orientation on imbibition front evolution was minimal for the time- and length-scales considered in this investigation. While different injection rates and fluid types showed significant differences in the shape of the imbibing front, breakthrough time, and saturation profiles. The speed and shape of imbibing front progressions were found to be sensitive to matrix water relative permeability, capillary pressure contrast between matrix and fracture, and degree of rock heterogeneity. Results from this work also demonstrated conditions that favor co-current, counter-current, and the coexistence of both displacement mechanisms during imbibition. Co-current flow dominates in the case of water displacing air, while counter-current flow dominates in the case of water displacing kerosene. The balance of capillarity and relative permeabilities has a significant impact of the shape on the invasion front, resulting in periods of co-current and counter-current imbibition. This work presents direct evidence of spontaneous migration of wetting fluids into a rock matrix embedding a fracture. These observations and conclusions are not limited by the geometry of the system and have important implication for water flooding of naturally fractured reservoir and leak-off retention and migration after hydraulic fracture treatments. Advisors/Committee Members: Zuleima T Karpyn, Dissertation Advisor/Co-Advisor, Zuleima T Karpyn, Committee Chair/Co-Chair, Turgay Ertekin, Committee Member, Derek Elsworth, Committee Member, Yilin Wang, Committee Member, Kamini Singha, Committee Member.

Subjects/Keywords: Imbibition; Computed Tomography; Fractures; Capillarity

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APA (6^th Edition):

Lee, C. (2011). PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11694

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lee, Chung-Hao. “PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA.” 2011. Thesis, Penn State University. Accessed March 01, 2021. https://submit-etda.libraries.psu.edu/catalog/11694.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lee, Chung-Hao. “PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA.” 2011. Web. 01 Mar 2021.

Vancouver:

Lee C. PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 01]. Available from: https://submit-etda.libraries.psu.edu/catalog/11694.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lee C. PARAMETRIC STUDY OF FACTORS AFFECTING CAPILLARY IMBIBITION IN FRACTURED POROUS MEDIA. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/11694

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Ryuhei Katsui; Norihiro Samoto; Akira Taniguchi; Manabu Akahane; Shinji Isomoto; Kazuya Sugimoto; Yasuhito Tanaka. Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係.

Degree: 博士（医学）, 2016, Nara Medical University / 奈良県立医科大学

URL: http://hdl.handle.net/10564/3283

► BACKGROUND: Although the tangential sesamoid view is used to visualize the sesamoid position relative to the first metatarsal head, correctly evaluating patients with severe varus… (more)

▼ BACKGROUND: Although the tangential sesamoid view is used to visualize the sesamoid position relative to the first metatarsal head, correctly evaluating patients with severe varus of the first metatarsal is difficult. Computed tomography (CT) can be helpful due to its cross-sectional images in any plane. The purposes of this study were to evaluate the alignment of the tibial sesamoid and investigate the relationship between malalignment and degenerative change in the sesamoid metatarsal joint (SMJ) using simulated weight-bearing CT imaging in patients with hallux valgus. METHODS: In total, 269 feet from 142 patients with hallux valgus were included. The mean age was 63.7 years (range, 33-87 years). An anteroposterior weight-bearing radiograph was assessed for sesamoid position into 3 grades: grade 1, the tibial sesamoid was medial to the axis of the first metatarsal; grade 2, the tibial sesamoid was located below the first metatarsal axis; and grade 3, the tibial sesamoid was lateral to the first metatarsal axis. The hallux valgus and intermetatarsal angles (HVA and IMA, respectively) were measured. The lateral shift of the tibial sesamoid relative to the first metatarsal was classified into 3 grades on simulated weight-bearing CT classification: grade 1, tibial sesamoid was entirely medial to the intersesamoid ridge; grade 2, tibial sesamoid was subluxated laterally but located below the intersesamoid ridge; and grade 3, tibial sesamoid was located entirely lateral to the intersesamoid ridge. The differences of HVA and IMA in each grade were confirmed by using 1-way analysis of variance with Bonferroni post hoc corrections. Furthermore, multiple linear regression analysis was used to predict the degenerative change in the SMJ for age, sex, sesamoid position determined by CT or plain radiography, HVA, and IMA. The χ2 test was used for descriptive statistics to analyze the agreement between radiography or CT classifications of sesamoid position against degenerative change in the SMJ. RESULTS: Based on the radiographic classification of the tibial sesamoid position, 7 feet were classified as grade 1, 72 were grade 2, and 190 were grade 3, respectively. Based on the CT classification, 34 feet were classified as grade 1, 116 were grade 2, and 119 were grade 3. Degenerative change in SMJ progressed according to the sesamoid shift relative to the first metatarsal using either radiography or CT. In radiography, statistically significant differences were found except for the difference in HVA between grades 1 and 2. In addition, statistically significant differences were found between HVA and IMA, along with the grades in CT.In multiple linear regression, degenerative change was correlated with age and sesamoid position in CT and radiographic classifications. CONCLUSION: Our study showed that lateral shift of the tibial sesamoid increased in association with progression of the hallux valgus deformity. Furthermore, increasing lateral shift of the tibial sesamoid was associated with worsening degenerative change within the…

Subjects/Keywords: sesamoid; hallux valgus; computed tomography

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APA (6^th Edition):

Tanaka, R. K. N. S. A. T. M. A. S. I. K. S. Y. (2016). Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係. (Thesis). Nara Medical University / 奈良県立医科大学. Retrieved from http://hdl.handle.net/10564/3283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tanaka, Ryuhei Katsui; Norihiro Samoto; Akira Taniguchi; Manabu Akahane; Shinji Isomoto; Kazuya Sugimoto; Yasuhito. “Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係.” 2016. Thesis, Nara Medical University / 奈良県立医科大学. Accessed March 01, 2021. http://hdl.handle.net/10564/3283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tanaka, Ryuhei Katsui; Norihiro Samoto; Akira Taniguchi; Manabu Akahane; Shinji Isomoto; Kazuya Sugimoto; Yasuhito. “Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係.” 2016. Web. 01 Mar 2021.

Vancouver:

Tanaka RKNSATMASIKSY. Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係. [Internet] [Thesis]. Nara Medical University / 奈良県立医科大学; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10564/3283.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tanaka RKNSATMASIKSY. Relationship Between Displacement and Degenerative Changes of the Sesamoids in Hallux Valgus. : 外反母祉における種子骨の偏位と関節症変化の関係. [Thesis]. Nara Medical University / 奈良県立医科大学; 2016. Available from: http://hdl.handle.net/10564/3283

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh

10. MacDonald, Alisdair John. Assessment of muscle wasting.

Degree: Thesis (M.D.), 2015, University of Edinburgh

URL: http://hdl.handle.net/1842/16455

► Cachexia occurs commonly and is a significant cause of morbidity and up to 20% mortality in patients with cancer. Loss of muscle mass occurs as… (more)

▼ Cachexia occurs commonly and is a significant cause of morbidity and up to 20% mortality in patients with cancer. Loss of muscle mass occurs as part of the cachexia wasting process and low muscle mass is a key element of the most recent consensus cachexia definition. Measuring muscle mass and changes in skeletal muscle is important to phenotype cachectic individuals and to monitor response to anti-cachectic treatments. This thesis investigates minimally invasive or burdensome methods of measuring muscle mass and muscle protein kinetics for use in a clinical or research setting. Quantification of muscle area on routine diagnostic cross-sectional imaging offers a novel and relatively non-invasive method of assessing both regional (and by extrapolation) whole body muscle mass. The need for such a direct measurement of muscle mass was demonstrated by showing that simple anthropometric formulae are unable to predict muscularity accurately (within 25%) when compared with estimates derived from patients diagnostic CT scans. It may be that qualitative changes in muscle may be more sensitive indices of the wasting process rather than qualitative change. Myosteatosis (infiltration of muscle by fat) is known to occur in both cachexia and age related sarcopenia and can be quantified using the Hounsfield spectrum observed on routine diagnostic CT scans. However, not all patients undergo routine CT scanning and there is a need for a biomarker derived from urine or blood. Consequently, cross sectional imaging was used to phenotype patients in a proteomic analysis of urine with the aim of identifying protein or peptide biomarkers associated with myosteatosis in cancer cachexia. A biomarker model for myosteatosis was developed with good sensitivity (97%) but poor specificity (71%). Many of the potential protein / peptide markers identified had poor associations with known mechanisms of muscle wasting and further study of the identified peptides in an extended cohort would help determine the validity of the present findings. However, two proteins with potential roles in muscle repair or neuromuscular function (Agarin and Cathepsin C) were identified and these may warrant targeted investigation with evaluation against sequential measures of muscle mass to determine their value in defining muscle loss over time. As different regional measures of muscularity are available, trunk (L3 CT) and limb muscle (quadriceps MRI) cross sectional measurements were compared with functional assessments to determine the optimal site for measurement. Neither measure proved superior to the other but appeared to reflect different aspects of function. Quadriceps muscle area correlated with quadriceps strength and power whilst truncal muscle area correlated more with complex movements such as the timed-up-and-go test. Changes in regional muscle area in patients with upper gastrointestinal cancer were assessed by upper and lower limb MRI before and after surgery and by L3 CT cross sectional area before and after neo-adjuvant chemotherapy. No change in limb…

Subjects/Keywords: 616.7; cachexia; computed tomography; sarcopenia

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APA (6^th Edition):

MacDonald, A. J. (2015). Assessment of muscle wasting. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/16455

Chicago Manual of Style (16^th Edition):

MacDonald, Alisdair John. “Assessment of muscle wasting.” 2015. Doctoral Dissertation, University of Edinburgh. Accessed March 01, 2021. http://hdl.handle.net/1842/16455.

MLA Handbook (7^th Edition):

MacDonald, Alisdair John. “Assessment of muscle wasting.” 2015. Web. 01 Mar 2021.

Vancouver:

MacDonald AJ. Assessment of muscle wasting. [Internet] [Doctoral dissertation]. University of Edinburgh; 2015. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1842/16455.

Council of Science Editors:

MacDonald AJ. Assessment of muscle wasting. [Doctoral Dissertation]. University of Edinburgh; 2015. Available from: http://hdl.handle.net/1842/16455

Virginia Tech

11. Hand, Davis Kyle. A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography.

Degree: MS, Electrical and Computer Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/33804

► X-ray Computed Tomography (CT) is a process that produces three-dimensional x-ray images, allowing for better diagnosis and analysis of complex internal medical conditions. New advances… (more)

Subjects/Keywords: Computed Tomography; Photolithography; Electroplating; DRIE

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APA (6^th Edition):

Hand, D. K. (2011). A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/33804

Chicago Manual of Style (16^th Edition):

Hand, Davis Kyle. “A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography.” 2011. Masters Thesis, Virginia Tech. Accessed March 01, 2021. http://hdl.handle.net/10919/33804.

MLA Handbook (7^th Edition):

Hand, Davis Kyle. “A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography.” 2011. Web. 01 Mar 2021.

Vancouver:

Hand DK. A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10919/33804.

Council of Science Editors:

Hand DK. A Manufacturing Process for Single Micron Resolution Optical Gratings Used in X-ray Computed Tomography. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/33804

University of Sydney

12. Ayoub, Chadi. Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography .

Degree: 2019, University of Sydney

URL: http://hdl.handle.net/2123/20985

► CAD is a leading cause of morbidity and death. Coronary computed tomography angiography (CCTA) is an anatomic, non-invasive imaging technique that can diagnose and risk… (more)

▼ CAD is a leading cause of morbidity and death. Coronary computed tomography angiography (CCTA) is an anatomic, non-invasive imaging technique that can diagnose and risk stratify CAD, without the risks associated with invasive coronary angiography, the gold standard. This research first carried out a review of the literature to appraise current clinical applications of CCTA, its prognostic power and future directions in terms of advances. The segment involvement score (SIS), also termed the total plaque score (TPS), is a semi-quantitative score that gives an indication of coronary disease burden, and is consistent with the move from qualitative to quantitative CCTA reporting. Although SIS is often reported in scientific studies, it is not reported routinely in clinical CCTA studies. This research in sequential phases sought to first define the prognostic value of SIS by systemic review and meta-analysis of published literature. In addition to atherosclerosis burden, atherosclerotic progression has been advocated as a superior predictor of outcomes. Hence the novel measure ‘age adjusted SIS’ (aSIS) was devised. It was hypothesised that aSIS is a surrogate marker of ‘vascular age’, as it gives greater weighting to segments involved in those who are younger, and so may account for premature atherosclerotic disease. Evaluation of aSIS first in a hypothesis-generating study, and then with external validation in a large multinational registry, demonstrated that it has independent, incremental prognostic value to traditional risk factors and CCTA measures of CAD. In a subanalysis to compare directly to the well-established coronary artery calcium (CAC) score, aSIS also showed incremental prognostic value, but has the benefit of not needing additional concomitant scanning as CAC score requires. In the final phase of this research, aSIS was applied with other CCTA measures to evaluate CAD in French Canadians, a suggested vulnerable population with increased risk for premature coronary artery disease and clinical events. Taken together, this research supports the inclusion of SIS in routine clinical CCTA reports. The simplicity of SIS and aSIS makes them easily calculable on a routine basis for clinical reports of CCTA, and they have potential to be calculated by automated software algorithms.

Subjects/Keywords: Coronary; Atherosclerosis; Computed Tomography

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ayoub, C. (2019). Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/20985

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ayoub, Chadi. “Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography .” 2019. Thesis, University of Sydney. Accessed March 01, 2021. http://hdl.handle.net/2123/20985.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ayoub, Chadi. “Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography .” 2019. Web. 01 Mar 2021.

Vancouver:

Ayoub C. Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography . [Internet] [Thesis]. University of Sydney; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2123/20985.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ayoub C. Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography . [Thesis]. University of Sydney; 2019. Available from: http://hdl.handle.net/2123/20985

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Sydney

13. Gnalini, Sathananthan. Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart .

Degree: 2019, University of Sydney

URL: http://hdl.handle.net/2123/21288

► Our study sought to examine the relationship between the true anatomical cardiac axis and the electrical cardiac axis of the heart. We examined these two… (more)

▼ Our study sought to examine the relationship between the true anatomical cardiac axis and the electrical cardiac axis of the heart. We examined these two axes in healthy middle aged controls, without structural heart disease. We then compared this with aged matched obese individuals and older individuals. We found a mean anatomical axis 38.1° ± 7.8° on cardiac computed tomography (CT) and a mean electrocardiogram (ECG) axis of 51.8° ± 26.6° in the control group, pearson r value 0.12 (p=0.365). In the obese age matched group, the mean anatomical axis was 25.1° ± 6.2° with a mean ECG axis of 20.1° ± 23.9°, pearson r value 0.05 (p=0.808). In the older group, the mean anatomical axis was 34.4° ± 9.1° with a mean ECG axis of 34.4° ± 30.3°, pearson r value 0.26 (p=0.209). Our results found that obese individuals have a more leftward rotation of both axes compared with age matched normals (p< 0.0001). The leftward rotation in the anatomical axis may be secondary to elevation of the diaphragm. The leftward rotation of the electrical axis in the obese population however is not well explained. Abnormal adipose deposition within the heart may result in subclinical conduction disease in this patient group. Older individuals had a more leftward rotation of their electrical cardiac axis only (p=0.01), which may be a normal variant or may reflect underlying subclinical conduction disturbances, which is not uncommon in this age group. The study also found that there was no correlation between the CT and ECG axis in any of the groups with a correlation coefficient of 0.12, 0.05 and 0.26 in the control, obese and older group respectively. There appears to be no simple relationship between these two axes in any of the groups studied. Although the anatomical cardiac axis may and probably does influence the electrical cardiac axis, there does not appear to be a simple measure of how this occurs. Our study recommends these two axes not be used interchangeably as they are independent measures of two very different things.

Subjects/Keywords: electrocardiogram; computed tomography; cardiac axis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gnalini, S. (2019). Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/21288

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gnalini, Sathananthan. “Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart .” 2019. Thesis, University of Sydney. Accessed March 01, 2021. http://hdl.handle.net/2123/21288.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gnalini, Sathananthan. “Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart .” 2019. Web. 01 Mar 2021.

Vancouver:

Gnalini S. Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart . [Internet] [Thesis]. University of Sydney; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2123/21288.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gnalini S. Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart . [Thesis]. University of Sydney; 2019. Available from: http://hdl.handle.net/2123/21288

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

14. Saulnier, Diane Christine. Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography.

Degree: MS, Biomedical and Veterinary Sciences, 2012, Virginia Tech

URL: http://hdl.handle.net/10919/34046

► ECG-gated multidetector computed tomography (MDCT) is an imaging modality widely utilized for the evaluation of cardiac pathology by physicians. However, there has been little research… (more)

▼ ECG-gated multidetector computed tomography (MDCT) is an imaging modality widely utilized for the evaluation of cardiac pathology by physicians. However, there has been little research of cardiac MDCT imaging in veterinary patients. Presently, ECG-gating is an upgrade for MDCT, which few veterinary institutions currently possess. The purpose of this study was to compare image quality between a 16 non ECG-gated and 64 ECG-gated MDCT for clinically important cardiac anatomy in dogs. In a crossover trial, six dogs were scanned using 16 non ECG-gated and 64 ECG-gated MDCT. A standardized anesthetic protocol, designed to induce bradycardia (mean HR 45 bpm Â± 12.6) was used. Five post-contrast sequential scans through the heart were performed for each patient when utilizing the 16 non ECG-gated MDCT, in attempt to obtain a motion free series of images of the heart. For each scan, assessment of cardiac morphology was performed by evaluating a group of 21 cardiac structures, using a 3-point scale. Each of the images were scored as 0 (motion present, scan non-diagnostic), 1 (motion present, scan diagnostic), and 2 (no motion, therefore diagnostic scan of high quality). Quality scores (QS) from all scans within a dog (30 scans total) were assigned for each cardiac structure. QS from the six ECG-gated MDCT scans were of high diagnostic quality, generating diagnostic images for all of the 21 cardiac structures evaluated for each of the 6 scans. Individual non ECG-gated scans were of variable quality, primarily generating QS of 1 or 2. A complete set of diagnostic images for all 21 structures was not achieved from an individual scan. Minimum number of non ECG-gated scans to identify a single structure was calculated, and ranged from 1-2 scans for all structures. Cumulative number of sequential non ECG-gated scans needed to achieve images of all cardiac structures was calculated and determined to be 5. A 16 non ECG-gated MDCT scanner can produce cardiac images that are similar in quality, to those of 64 ECG-gated MDCT. Cardiac motion negatively impacts image quality in studies acquired without ECG-gating. However, this can be overcome by performing multiple sequential scans through the heart. Advisors/Committee Members: Daniel, Gregory B. (committeechair), Pereira, Carolina Ricco (committee member), Tyson, Reid (committee member).

Subjects/Keywords: MDCT; Computed tomography; Cardiac; Canine

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APA (6^th Edition):

Saulnier, D. C. (2012). Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/34046

Chicago Manual of Style (16^th Edition):

Saulnier, Diane Christine. “Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography.” 2012. Masters Thesis, Virginia Tech. Accessed March 01, 2021. http://hdl.handle.net/10919/34046.

MLA Handbook (7^th Edition):

Saulnier, Diane Christine. “Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography.” 2012. Web. 01 Mar 2021.

Vancouver:

Saulnier DC. Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography. [Internet] [Masters thesis]. Virginia Tech; 2012. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10919/34046.

Council of Science Editors:

Saulnier DC. Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography. [Masters Thesis]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/34046

Baylor University

15. Stenson, John P., 1993-. Chord length methods for Proton Computed Tomography.

Degree: M.S.B.M.E., Baylor University. Dept. of School of Engineering., 2017, Baylor University

URL: http://hdl.handle.net/2104/10177

► Proton Computed Tomography (also known as pCT) is an emerging medical imaging method. The three dimensional images reconstructed from pCT scans provide information about the… (more)

Subjects/Keywords: Proton Computed Tomography. Protons. Computed Tomography chord length. Reconstruction techniques.

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APA (6^th Edition):

Stenson, John P., 1. (2017). Chord length methods for Proton Computed Tomography. (Masters Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/10177

Chicago Manual of Style (16^th Edition):

Stenson, John P., 1993-. “Chord length methods for Proton Computed Tomography.” 2017. Masters Thesis, Baylor University. Accessed March 01, 2021. http://hdl.handle.net/2104/10177.

MLA Handbook (7^th Edition):

Stenson, John P., 1993-. “Chord length methods for Proton Computed Tomography.” 2017. Web. 01 Mar 2021.

Vancouver:

Stenson, John P. 1. Chord length methods for Proton Computed Tomography. [Internet] [Masters thesis]. Baylor University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/2104/10177.

Council of Science Editors:

Stenson, John P. 1. Chord length methods for Proton Computed Tomography. [Masters Thesis]. Baylor University; 2017. Available from: http://hdl.handle.net/2104/10177

University of Notre Dame

16. Tyler E. Curtis. Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>.

Degree: Bioengineering, 2019, University of Notre Dame

URL: https://curate.nd.edu/show/cf95j96359f

► Clinical and preclinical X-ray computed tomography (CT) provides three-dimensional anatomic imaging at high spatial and temporal resolution. However, quantitative molecular imaging is not possible… (more)

▼ Clinical and preclinical X-ray computed tomography (CT) provides three-dimensional anatomic imaging at high spatial and temporal resolution. However, quantitative molecular imaging is not possible in conventional CT due to similarity in the overall X-ray attenuation across the polychromatic X‑ray photon energy spectrum and the use of energy integrating detectors. However, recent developments in photon-counting detectors have led to the development of prototype photon-counting spectral CT systems that can acquire images at multiple energy levels which, when used in conjunction with material decomposition algorithms, can identify and quantify contrast agent and tissue compositions. Thus, photon-counting spectral CT can provide simultaneous anatomic and quantitative molecular imaging. However, the development of these capabilities and their application remains nascent due to a limited availability of imaging systems. Therefore, the overall objective of this dissertation was to investigate quantitative material decomposition of multiple, discrete or spatially coincident, contrast agent and tissue compositions using a prototype preclinical photon-counting spectral CT system. Methods were developed for material decomposition using constrained maximum likelihood estimation (MLE) in the imaging domain and calibrated using multiple linear regression models of known material concentrations. The median root mean squared error (RMSE) for material decomposition of a single gadolinium contrast agent was as low as ~1.5 mM (~0.24 mg/mL gadolinium), similar in magnitude to that measured by optical spectroscopy. Material decomposition of multiple discrete contrast agent and tissue compositions was subsequently demonstrated in several models. Multiple discrete contrast agent compositions were able to be simultaneously evaluated with quantitative accuracy (RMSE) that was comparable to results for a single contrast agent and were able to be identified even against highly attenuating bone tissue. Image-based material decomposition was also able to identify contrast agents within murine models at an image acquisition time suitable for in vivo preclinical imaging. Multiple mixed, or spatially coincident, contrast agent (gadolinium and iodine) and tissue (calcium and water) compositions were identified and quantified with high accuracy (area under the receiver operating characteristic curve (AUC) > 0.8, RMSE < 12%). Finally, the methods used for mixed component material decomposition were further developed to allow elemental decomposition of Ca, P and O, which enabled discrimination of pathologically-relevant microcalcifications (hydroxyapatite versus calcium oxalate, AUC > 0.8) at a clinically-relevant size (maximum dimension < 1 mm). Thus, photon-counting spectral CT enabled quantitative molecular imaging of multiple, spatially coincident contrast agent and tissue compositions, which is not possible with current clinical molecular imaging modalities Advisors/Committee Members: Ryan K. Roeder, Research Director.

Subjects/Keywords: Photon-Counting Computed Tomography; Material Decomposition; Spectral Computed Tomography

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APA (6^th Edition):

Curtis, T. E. (2019). Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/cf95j96359f

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Curtis, Tyler E.. “Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>.” 2019. Thesis, University of Notre Dame. Accessed March 01, 2021. https://curate.nd.edu/show/cf95j96359f.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Curtis, Tyler E.. “Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>.” 2019. Web. 01 Mar 2021.

Vancouver:

Curtis TE. Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>. [Internet] [Thesis]. University of Notre Dame; 2019. [cited 2021 Mar 01]. Available from: https://curate.nd.edu/show/cf95j96359f.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Curtis TE. Material Decomposition Using Photon-Counting Spectral Computed Tomography</h1>. [Thesis]. University of Notre Dame; 2019. Available from: https://curate.nd.edu/show/cf95j96359f

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universiteit Utrecht

17. Contini, E. Rib cage segmentation in CT scans.

Degree: 2014, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/297248

► The need for reliable segmentations of rib cages in 3D images like CT or MRI is a first importance problem in the field of medical… (more)

Subjects/Keywords: Ribs; segmentation; X-ray computed tomography

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APA (6^th Edition):

Contini, E. (2014). Rib cage segmentation in CT scans. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/297248

Chicago Manual of Style (16^th Edition):

Contini, E. “Rib cage segmentation in CT scans.” 2014. Masters Thesis, Universiteit Utrecht. Accessed March 01, 2021. http://dspace.library.uu.nl:8080/handle/1874/297248.

MLA Handbook (7^th Edition):

Contini, E. “Rib cage segmentation in CT scans.” 2014. Web. 01 Mar 2021.

Vancouver:

Contini E. Rib cage segmentation in CT scans. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2021 Mar 01]. Available from: http://dspace.library.uu.nl:8080/handle/1874/297248.

Council of Science Editors:

Contini E. Rib cage segmentation in CT scans. [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/297248

18. Willemink, M.J. Iterative Reconstruction for Cardiopulmonary Computed Tomography.

Degree: 2015, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/313071

► Introduction The number of computed tomography (CT) examinations has increased rapidly since CT became commercially available. This resulted in growing concerns regarding the risk of… (more)

▼ Introduction The number of computed tomography (CT) examinations has increased rapidly since CT became commercially available. This resulted in growing concerns regarding the risk of malignancies induced by application of medical ionizing radiation. Therefore, radiation dose reduction strategies are needed and being developed. This is especially important for patients who get many CT scans (e.g. chest CT for follow up of lung nodules), CT scans with high radiation doses (e.g. scans of the heart) and for children who are more sensitive to radiation. A recent dose reduction strategy focuses on optimization of image reconstruction. With current reconstruction methods, radiation dose reduction results in noisy images, which are susceptible to artefacts. Iterative reconstruction (IR) is an alternative image reconstruction method that allows for image quality improvement at similar radiation dose or imaging at lower radiation dose without compromising image quality compared to current methods. Improved computational power of CT reconstruction workstations has permitted the recent introduction of IR for CT. Purpose The aim of this thesis was to evaluate both potential applications of IR: improving image quality and reducing radiation dose of CT scans of the heart and the lungs. First, in-vitro and ex-vivo preclinical research was performed to globally assess the potentials of IR for both applications. Second, image acquisition of cardiopulmonary CT examinations was optimized in-vivo with IR. Finally, IR was applied to reduce the radiation dose in the clinical setting and explore novel indications for CT. Results With the current thesis, we showed that IR can be used to improve image quality in routine dose CT, to reduce the radiation dose without loss of image quality, or with a combination of both strategies. We conclude that radiation doses for CCTA, calcium scoring CT, contrast-enhanced chest CT and plain chest CT can be reduced substantially by using IR. For calcium scoring CT scans of the heart, we first performed a phantom study, then an ex-vivo study and finally a pilot study in 30 individuals evaluating the maximally achievable radiation dose reduction. Based on these studies we found a potential radiation dose reduction of 80%. Reducing the radiation dose of CT imaging also allows for broadening the diagnostic value of CT scans of the lungs. If the radiation dose issue would be resolved, CT imaging could replace plain radiography for certain indications to reduce misdiagnosis. Conclusion Radiation doses for CT scans of the heart and the lungs can be reduced substantially by using IR. Advisors/Committee Members: Leiner, T., Jong, P.A. de, Budde, R.P.J..

Subjects/Keywords: Medicine; Radiology; Computed tomography; Radiation; Cardiovascular; Chest

11 more images…

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APA (6^th Edition):

Willemink, M. J. (2015). Iterative Reconstruction for Cardiopulmonary Computed Tomography. (Doctoral Dissertation). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/313071

Chicago Manual of Style (16^th Edition):

Willemink, M J. “Iterative Reconstruction for Cardiopulmonary Computed Tomography.” 2015. Doctoral Dissertation, Universiteit Utrecht. Accessed March 01, 2021. http://dspace.library.uu.nl:8080/handle/1874/313071.

MLA Handbook (7^th Edition):

Willemink, M J. “Iterative Reconstruction for Cardiopulmonary Computed Tomography.” 2015. Web. 01 Mar 2021.

Vancouver:

Willemink MJ. Iterative Reconstruction for Cardiopulmonary Computed Tomography. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2015. [cited 2021 Mar 01]. Available from: http://dspace.library.uu.nl:8080/handle/1874/313071.

Council of Science Editors:

Willemink MJ. Iterative Reconstruction for Cardiopulmonary Computed Tomography. [Doctoral Dissertation]. Universiteit Utrecht; 2015. Available from: http://dspace.library.uu.nl:8080/handle/1874/313071

University of Ghana

19. Sackey, T.A. Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) .

Degree: 2015, University of Ghana

URL: http://ugspace.ug.edu.gh/handle/123456789/22588

► The aim of this study is to estimate the effective dose and assess the lifetime attributable risk of cancer incidence of patients undergoing computed tomography… (more)

Subjects/Keywords: Cancer; Computed Tomography Examination; Dosage; Ghana

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APA (6^th Edition):

Sackey, T. A. (2015). Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) . (Masters Thesis). University of Ghana. Retrieved from http://ugspace.ug.edu.gh/handle/123456789/22588

Chicago Manual of Style (16^th Edition):

Sackey, T A. “Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) .” 2015. Masters Thesis, University of Ghana. Accessed March 01, 2021. http://ugspace.ug.edu.gh/handle/123456789/22588.

MLA Handbook (7^th Edition):

Sackey, T A. “Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) .” 2015. Web. 01 Mar 2021.

Vancouver:

Sackey TA. Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) . [Internet] [Masters thesis]. University of Ghana; 2015. [cited 2021 Mar 01]. Available from: http://ugspace.ug.edu.gh/handle/123456789/22588.

Council of Science Editors:

Sackey TA. Cancer Risk Assessment of Patients Undergoing Computed Tomography Examination at the Korle-Bu Teaching Hospital (KBTH) . [Masters Thesis]. University of Ghana; 2015. Available from: http://ugspace.ug.edu.gh/handle/123456789/22588

Rochester Institute of Technology

20. Kuhfahl, Meagan. Emulating the volume of pulminary nodules: A Quantitative approach.

Degree: School of Mathematical Sciences (COS), 2012, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/4974

► Doubling time for small pulmonary nodules is an important indicator used to diagnose lung cancer, a leading cause of death in the United States. The… (more)

Subjects/Keywords: Computed tomography; Gaussian weighted integration; Pulmonary nodules

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APA (6^th Edition):

Kuhfahl, M. (2012). Emulating the volume of pulminary nodules: A Quantitative approach. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/4974

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kuhfahl, Meagan. “Emulating the volume of pulminary nodules: A Quantitative approach.” 2012. Thesis, Rochester Institute of Technology. Accessed March 01, 2021. https://scholarworks.rit.edu/theses/4974.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kuhfahl, Meagan. “Emulating the volume of pulminary nodules: A Quantitative approach.” 2012. Web. 01 Mar 2021.

Vancouver:

Kuhfahl M. Emulating the volume of pulminary nodules: A Quantitative approach. [Internet] [Thesis]. Rochester Institute of Technology; 2012. [cited 2021 Mar 01]. Available from: https://scholarworks.rit.edu/theses/4974.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kuhfahl M. Emulating the volume of pulminary nodules: A Quantitative approach. [Thesis]. Rochester Institute of Technology; 2012. Available from: https://scholarworks.rit.edu/theses/4974

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Alberta

21. Dietrich, Nicholas H. Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images.

Degree: MS, Department of Mechanical Engineering Medical Sciences-Orthodontics, 2016, University of Alberta

URL: https://era.library.ualberta.ca/files/c8w32r5749

► In orthodontics superimposition is an important technique allowing for accurate diagnosis and treatment planning. Lower radiation, three-dimensional, cone-beam computed tomography allows for acquisition of three-dimensional… (more)

▼ In orthodontics superimposition is an important technique allowing for accurate diagnosis and treatment planning. Lower radiation, three-dimensional, cone-beam computed tomography allows for acquisition of three-dimensional patient scans. New superimposition methods are used compared to the traditional methods used for two-dimensional scans. A new superimposition method is designed in this thesis. A review of the current methods of superimposition used in orthodontics was performed. The review found that voxel-based, surface-based, and point-based superimposition methods are used. The most commonly used superimposition method is maximization of mutual information. A cone-beam computed tomography machine is tested to find any inherent machine properties that may influence superimposition. The testing found that cone-beam computed tomography preserves and allows for highly accurate linear measurements. When greyscale values are viewed on a global scale there is not much change between scans. An issue arises when greyscale values are only viewed and compared between scans for a very small region of interest. Voxel-based superimposition methods must ensure they use a large enough region for the superimposition. A full mathematical proof is contained within this thesis, outlining the techniques used in the superimposition method as well as the method itself. This includes proofs of the relevant techniques used, such as shift invariance for Fourier transform or finding the shift between two images using phase correlation. The algorithm works by taking two three-dimensional images and converting them to the frequency domain using Fourier transforms. The Fourier transform removes the translation differences between the two images while preserving any differences due to rotation. The rotational changes are then converted to translations using a coordinate transform from Cartesian to cylindrical coordinates. The translational difference between the two volumes is found using phase correlation. This corresponds to a rotational shift between the two images about a single axis that can then be corrected. The entire process is then iterated through to correct for all rotational differences between the images. A final phase correlation allows for correction of all translations to fully register two images. A simple validation is included. The algorithm is tested against patient scans. This is done in two manners, finding the registrations ability to register scans with known error, and registering time one and time two scans of real patient data with unknown initial error between the scans. The algorithm is also compared to the 6 point superimposition method found in literature. The new registration algorithm had comparable, or superior, accuracy in 4 out of 10 tests. The new algorithm had a 57% faster runtime compared to the six point method. The new registration algorithm required less user involvement than the six point method, only requiring a rough selection of the cranial base for each patient scan versus measuring multiple…

Subjects/Keywords: Registration; Cone-Beam Computed Tomography; CBCT

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dietrich, N. H. (2016). Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/c8w32r5749

Chicago Manual of Style (16^th Edition):

Dietrich, Nicholas H. “Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images.” 2016. Masters Thesis, University of Alberta. Accessed March 01, 2021. https://era.library.ualberta.ca/files/c8w32r5749.

MLA Handbook (7^th Edition):

Dietrich, Nicholas H. “Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images.” 2016. Web. 01 Mar 2021.

Vancouver:

Dietrich NH. Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2021 Mar 01]. Available from: https://era.library.ualberta.ca/files/c8w32r5749.

Council of Science Editors:

Dietrich NH. Voxel-Based Iterative Registration Method using Phase Correlations for Three-Dimensional Cone-Beam Computed Tomography Acquired Images. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/c8w32r5749

Cornell University

22. Fotin, Sergey. Computer-Aided Detection Of Pulmonary Nodules From Ct Scans.

Degree: PhD, Electrical Engineering, 2011, Cornell University

URL: http://hdl.handle.net/1813/33630

► Lung cancer is the leading cause of cancer related death in the world. Computed tomography (CT), which can provide detailed images of lung structure, makes… (more)

Subjects/Keywords: Computer-aided detection; Pulmonary nodules; Computed tomography

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APA (6^th Edition):

Fotin, S. (2011). Computer-Aided Detection Of Pulmonary Nodules From Ct Scans. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33630

Chicago Manual of Style (16^th Edition):

Fotin, Sergey. “Computer-Aided Detection Of Pulmonary Nodules From Ct Scans.” 2011. Doctoral Dissertation, Cornell University. Accessed March 01, 2021. http://hdl.handle.net/1813/33630.

MLA Handbook (7^th Edition):

Fotin, Sergey. “Computer-Aided Detection Of Pulmonary Nodules From Ct Scans.” 2011. Web. 01 Mar 2021.

Vancouver:

Fotin S. Computer-Aided Detection Of Pulmonary Nodules From Ct Scans. [Internet] [Doctoral dissertation]. Cornell University; 2011. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1813/33630.

Council of Science Editors:

Fotin S. Computer-Aided Detection Of Pulmonary Nodules From Ct Scans. [Doctoral Dissertation]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/33630

23. Gharge, Saylee. Segmentation of Medical Images.

Degree: Electronic, 2013, INFLIBNET

URL: http://shodhganga.inflibnet.ac.in/handle/10603/9107

►

The use of digital images has increased at a rapid pace over the past decade. Many recent imaging modalities in medicine, such as magnetic resonance… (more)

Subjects/Keywords: Medical Images; Magnetic Resonance Imaging; Computed Tomography

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APA (6^th Edition):

Gharge, S. (2013). Segmentation of Medical Images. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9107

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gharge, Saylee. “Segmentation of Medical Images.” 2013. Thesis, INFLIBNET. Accessed March 01, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/9107.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gharge, Saylee. “Segmentation of Medical Images.” 2013. Web. 01 Mar 2021.

Vancouver:

Gharge S. Segmentation of Medical Images. [Internet] [Thesis]. INFLIBNET; 2013. [cited 2021 Mar 01]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9107.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gharge S. Segmentation of Medical Images. [Thesis]. INFLIBNET; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9107

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

24. Anita titus. An intelligent framework for clinical decision making from lung CT slices;.

Degree: An intelligent framework for clinical decision making from lung CT slices, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/34164

►

Computer Aided Diagnosis CAD is one of the major research areas in the field of medical imaging and radiology CAD systems are used by radiologists… (more)

Subjects/Keywords: Computed tomography; Computer Aided Diagnosis; Glass opacities

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APA (6^th Edition):

titus, A. (2015). An intelligent framework for clinical decision making from lung CT slices;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/34164

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

titus, Anita. “An intelligent framework for clinical decision making from lung CT slices;.” 2015. Thesis, Anna University. Accessed March 01, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/34164.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

titus, Anita. “An intelligent framework for clinical decision making from lung CT slices;.” 2015. Web. 01 Mar 2021.

Vancouver:

titus A. An intelligent framework for clinical decision making from lung CT slices;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Mar 01]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34164.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

titus A. An intelligent framework for clinical decision making from lung CT slices;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34164

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Newcastle

25. Gao, Jian. Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan.

Degree: MPhil, 2017, University of Newcastle

URL: http://hdl.handle.net/1959.13/1349936

►

Masters Research - Master of Philosophy (MPhil)

Background: Non-contrast brain computed tomography (NCCT) remains the most common imaging modality employed to select patients for thrombolytic… (more)

Subjects/Keywords: stroke; tomography; x-ray computed; time

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APA (6^th Edition):

Gao, J. (2017). Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan. (Masters Thesis). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1349936

Chicago Manual of Style (16^th Edition):

Gao, Jian. “Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan.” 2017. Masters Thesis, University of Newcastle. Accessed March 01, 2021. http://hdl.handle.net/1959.13/1349936.

MLA Handbook (7^th Edition):

Gao, Jian. “Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan.” 2017. Web. 01 Mar 2021.

Vancouver:

Gao J. Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan. [Internet] [Masters thesis]. University of Newcastle; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1959.13/1349936.

Council of Science Editors:

Gao J. Visibility of CT early ischemic change significantly associates with time from stroke onset to baseline scan. [Masters Thesis]. University of Newcastle; 2017. Available from: http://hdl.handle.net/1959.13/1349936

North Carolina State University

26. Hykes, Joshua Michael. Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients.

Degree: MS, Nuclear Engineering, 2009, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/1947

► Computed tomography (CT) is an invaluable diagnostic tool in current medical practice. Unfortunately, the radiation dose imparted during a CT scan can be significant. This… (more)

▼ Computed tomography (CT) is an invaluable diagnostic tool in current medical practice. Unfortunately, the radiation dose imparted during a CT scan can be significant. This thesis seeks to develop, verify, and validate appropriate computational methods for computing this dose accurately and efficiently. The components of the model are the nuclear data, transport methods, and computer codes. Monte Carlo transport methods are employed primarily for their ability to accurately capture most of the relevant physical phenomena. Deterministic transport methods are subsequently verified and validated. The work is divided into three stages: experimental, verification, and validation. The experimental stage involves gathering high-fidelity data to aid in the validation procedures. Multiple radiation detection devices are employed to give greater certainty to the results. In addition, an important task is gathering data using a geometrically simplified phantom which is easier to model than the detailed Rando phantom. Towards this end, a CTDI FDA phantom is imaged. Exposure and dose measurements were taken in air and in the phantom center and periphery. The second stage, verification, involves the testing of the deterministic model for correctness of the methodology and the physics data, i.e. cross section library. Primarily, there are a few key assumptions which must be tested. The first is the importance of the secondary electron transport. Using Monte Carlo methods, it is found that the transport is unimportant for the accurate computation of the dose deposition distribution given the relatively low energy photons produced by x-rays tubes employed in CT scan machines. This makes the deterministic transport calculations much simpler. Next, the discretization of space, energy, and angle in the deterministic model is examined to ensure sufficient refinement capable of delivering accurate results. The Monte Carlo method is an excellent complement to deterministic methods, serving as reference as though it were an actual experiment, thus allowing the testing of these issues in a straightforward and highly controlled manner. In each discretization, the deterministic model proved capable, although some flux spectrum results differed by fifteen percent or more, mostly a result of the multigroup cross section set. Finally, after ensuring that the deterministic model was functioning as expected, a comparison was made of the simulations to the experimentally measured data. This was the most difficult of the tasks, in great part because of the lack of precise knowledge of detailed information concerning some of the parameters comprising the experimental setup. However, much effort was placed into conforming the simulations to the experiment as closely as possible. The ratio of exposures in the CTDI FDA phantom periphery-to-center is computed to within experimental uncertainty of about ten percent, while the absolute computed exposures have greater errors. The absolute exposures differed from the measured values by less… Advisors/Committee Members: Dmitriy Y. Anistratov, Committee Member (advisor), Zhilin Li, Committee Member (advisor), Yousry Y. Azmy, Committee Chair (advisor).

Subjects/Keywords: deterministic radiation transport; computed tomography; radiation dose

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APA (6^th Edition):

Hykes, J. M. (2009). Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1947

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hykes, Joshua Michael. “Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients.” 2009. Thesis, North Carolina State University. Accessed March 01, 2021. http://www.lib.ncsu.edu/resolver/1840.16/1947.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hykes, Joshua Michael. “Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients.” 2009. Web. 01 Mar 2021.

Vancouver:

Hykes JM. Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients. [Internet] [Thesis]. North Carolina State University; 2009. [cited 2021 Mar 01]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1947.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hykes JM. Verification and Validation of Radiation Transport Numerical Methods, Codes, and Nuclear Data for Estimating Radiation Dose to Patients. [Thesis]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1947

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Otago

27. Al-dameh, Ala. Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography .

Degree: 2011, University of Otago

URL: http://hdl.handle.net/10523/1995

► Aim: To evaluate, using micro-computed tomography, the root canal transportation and centering ability of BioRaCe and AlphaKite rotary instruments, and their ability to eradicate canal… (more)

▼ Aim: To evaluate, using micro-computed tomography, the root canal transportation and centering ability of BioRaCe and AlphaKite rotary instruments, and their ability to eradicate canal variations after preparation of the mesiobuccal root of the first maxillary molar tooth. Methodology: Mesiobuccal roots of 20 maxillary first molars with similar angles of curvature were divided randomly into two groups and scanned using a SkyScan 1172 micro-CT scanner (SkyScan N.V., Aartselaar, Belgium). Root canals were then prepared with BioRaCe (FKG Dentaire, La Chaux-de-Fonds, Switzerland) or AlphaKite (Komet, Lemgo, Germany) instruments. The prepared roots were re-scanned and cross-sectional images of the pre- and post-instrumentation scans were reconstructed using the SkyScan reconstruction software. The amount of transportation was assessed quantitatively using the cross-sectional images by measuring the shortest distance from the edge of the uninstrumented canal to the periphery of the root (mesial and distal) and then comparing this with the same measurements obtained from the instrumented images. A negative result indicates transportation toward the distal surface of the root (inner curvature), a positive result toward the mesial surface (outer curvature), and nil, the absence of transportation. The centering ratio was calculated by using a formula in which a result of ‘1’ indicates perfect centering. Student t-tests and ANOVA tests were used for statistical analysis. Three- dimensional images of the root canals were then reconstructed using the appropriate software (Amira 4.1; Visage Imaging Inc., USA), to evaluate eradication of canal variations by the two instruments. Results: The average canal transportation with BioRaCe instruments at the coronal, middle and apical thirds were, -0.12 ± 0.19, -0.01 ± 0.09 and +0.06 ± 0.05 mm, respectively, with a significant difference (P < 0.05) in the amount of transportation between the coronal and apical levels. The average canal transportation with AlphaKite instruments in the coronal, middle and apical thirds were -0.05 ± 0.22, ₋0.04 ± 0.10 and +0.03 ± 0.03 mm, respectively, with no significant difference between the levels (P > 0.05). Centering ratio using BioRaCe at the coronal (0.32 ± 0.25), middle (0.53 ± 0.23), and apical (0.57 ± 0.27) thirds showed no significant difference between the levels (P > 0.05). For the AlphaKite system, the centering ratio results were (0.46 ± 0.31) for the coronal, (0.56 ± 0.29) for the middle and (0.66 ± 0.24) for the apical thirds. No significant difference was found between the levels (P > 0.05). There was no statistically significant difference between the systems in regard to canal transportation and their centering ability across all levels (P > 0.05). Neither was able to completely eradicate canal variations of the mesiobuccal root of maxillary first molars. Conclusions: Within the limitations of this ex vivo study, the two new nickel-titanium instruments produced moderately well centered canals with minimal canal transportation.… Advisors/Committee Members: Love, Robert (advisor).

Subjects/Keywords: rotary canal preparation; Micro-computed tomography

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APA (6^th Edition):

Al-dameh, A. (2011). Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography . (Doctoral Dissertation). University of Otago. Retrieved from http://hdl.handle.net/10523/1995

Chicago Manual of Style (16^th Edition):

Al-dameh, Ala. “Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography .” 2011. Doctoral Dissertation, University of Otago. Accessed March 01, 2021. http://hdl.handle.net/10523/1995.

MLA Handbook (7^th Edition):

Al-dameh, Ala. “Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography .” 2011. Web. 01 Mar 2021.

Vancouver:

Al-dameh A. Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography . [Internet] [Doctoral dissertation]. University of Otago; 2011. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10523/1995.

Council of Science Editors:

Al-dameh A. Root canal preparation with two different rotary systems: comparative study assessed by micro-computed tomography . [Doctoral Dissertation]. University of Otago; 2011. Available from: http://hdl.handle.net/10523/1995

28. Liu, Rui. The Software and Hardware Acceleration for Interior Tomography.

Degree: 2016, Wake Forest University

URL: http://hdl.handle.net/10339/64178

► The x-ray CT is with high spatial resolution, temporal resolutions, and high-speed imaging characteristic. The iterative reconstruction algorithms are becoming more important since they can… (more)

Subjects/Keywords: Computed Tomography

…Reconstruction CT: Computed Tomography IRAs: Iterative Reconstruction Algorithms CUDA: Compute Unified… …SVD SPECT: Single Photon Emission Computed Tomography 16 Abstract The x-ray CT is with… …X-ray computed tomography (CT) is one of the main modern imaging modalities. It… …Inspired by the CS theory, the interior problem in computed tomography is proved uniquely… …Introduction The x-ray computed tomography (CT) has been an indispensable imaging modality…

11 more images…

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APA (6^th Edition):

Liu, R. (2016). The Software and Hardware Acceleration for Interior Tomography. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/64178

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liu, Rui. “The Software and Hardware Acceleration for Interior Tomography.” 2016. Thesis, Wake Forest University. Accessed March 01, 2021. http://hdl.handle.net/10339/64178.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liu, Rui. “The Software and Hardware Acceleration for Interior Tomography.” 2016. Web. 01 Mar 2021.

Vancouver:

Liu R. The Software and Hardware Acceleration for Interior Tomography. [Internet] [Thesis]. Wake Forest University; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10339/64178.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liu R. The Software and Hardware Acceleration for Interior Tomography. [Thesis]. Wake Forest University; 2016. Available from: http://hdl.handle.net/10339/64178

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

29. Bharkhada, Deepak. Development of Novel Cardiac CT Methods.

Degree: 2010, Wake Forest University

URL: http://hdl.handle.net/10339/14902

► Cardiovascular diseases (CVD) are the number one killer in US and worldwide. In 2005, 1 in every 2.7 deaths was associated with CVD. Cardiac CT… (more)

▼ Cardiovascular diseases (CVD) are the number one killer in US and worldwide. In 2005, 1 in every 2.7 deaths was associated with CVD. Cardiac CT has become a very valuable tool for non-invasive CVD diagnosis due to enabling technologies like helical scanning, fast rotation, multi-row detector, and advanced image reconstruction. However, challenges like cone-beam artifact reduction, temporal resolution improvement and x-ray dose reduction must be met to improve and broaden cardiac CT applications. To address these issues, the methods of interior tomography, compressive sensing based algorithms, knowledge-based dynamic volumetric cardiac CT, and controlled cardiac CT were developed along with novel trajectories like saddle curves and composite-circling scanning. Interior tomography permits reconstruction of a region of interest (ROI) using only the x-rays through the ROI, provided that we have appropriate prior knowledge such as the intensity of a small sub-region within the ROI. We evaluated the dose and scatter reduction capabilities of this method. Our results indicate that x-ray dose and scatter can be reduced respectively by ~18 to ~57% and ~19 to ~59% for SFOVs of 21 to 9 cm as compared to the 50 cm SFOV. We evaluated the possibility of using blood in aorta and bone in vertebra as known information. To enable accurate interior tomography reconstruction, we also developed an extended projection onto convex sets (POCS) based method and studied the contributions of individual constraints. Using the compressive sensing theory, it has recently become possible to reconstruct a piece-wise constant ROI using interior tomography. The ability of a total-variation minimization based algorithm was then demonstrated with a limited number of projections. Since the circular cone-beam trajectory does not satisfy the data completeness condition, which results in artifacts, we extended it to the composite-circling trajectory. We obtained promising results, for the thorax phantom, using just 50 views. Knowledge-based dynamic volumetric cardiac CT algorithm is capable of reconstructing multiple-states of a beating heart based on the relationship between the state (e.g. volume) and phase (e.g. ECG). This algorithm was originally proposed using circular trajectory, which does not allow exact reconstruction. We extended it to a saddle-curve trajectory for exact reconstruction. Promising results were obtained with this knowledge-based approach for accurate reconstruction. Controlled cardiac CT proposes instantaneous change in the x-ray source velocity to acquire the required projections in a minimum time. The fast acquisitions with this approach result in a non-uniform distribution of x-ray source positions along a scanning trajectory. The implementation of analytical filtered-backprojection reconstruction algorithms used involves multiplication with a uniform angular discretization term. This could lead to reduced image quality especially if fewer views are used. We used triangle based linear interpolation,…

Subjects/Keywords: Computed Tomography

…62 References for Chapter III... �� ..64 IV. Cardiac Computed Tomography… …Reductions for Interior Computed Tomography �� …...93 Abstract… …Computed Tomography ��.. �� ...…156 Abstract �� ... �� ….157 VIII.1… …SOURCE X-RAY COMPUTED TOMOGRAPHY As we target higher and higher spatial resolutions, the… …overcome this limitation we proposed “Line-source X-ray Computed Tomography”. The x-ray source is…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bharkhada, D. (2010). Development of Novel Cardiac CT Methods. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/14902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bharkhada, Deepak. “Development of Novel Cardiac CT Methods.” 2010. Thesis, Wake Forest University. Accessed March 01, 2021. http://hdl.handle.net/10339/14902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bharkhada, Deepak. “Development of Novel Cardiac CT Methods.” 2010. Web. 01 Mar 2021.

Vancouver:

Bharkhada D. Development of Novel Cardiac CT Methods. [Internet] [Thesis]. Wake Forest University; 2010. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10339/14902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bharkhada D. Development of Novel Cardiac CT Methods. [Thesis]. Wake Forest University; 2010. Available from: http://hdl.handle.net/10339/14902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. Miao, Chuang. COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION.

Degree: 2013, Wake Forest University

URL: http://hdl.handle.net/10339/38514

► In this thesis, we propose an improved distance-driven model (IDDM) whose computational cost is as low as the distance-driven model (DDM) and the accuracy is… (more)

Subjects/Keywords: Computed Tomography

…CT Computed Tomography EBCT Electron Beam Computed Tomography FOV Field of View FWHMs… …Simultaneous Algebraic Reconstruction Technique SPECT Single Photon Emission Computed Tomography xi… …Tomography The first commercial x-ray Computed Tomography (CT) prototype was built in… …x29; [2-5]. Single Photon Emission Computed Tomography (SPECT) [6-8… …Pixel-driven Model PET Positron Emission Tomography RDM Ray-driven Model SART…

10 more images…

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APA (6^th Edition):

Miao, C. (2013). COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION. (Thesis). Wake Forest University. Retrieved from http://hdl.handle.net/10339/38514

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Miao, Chuang. “COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION.” 2013. Thesis, Wake Forest University. Accessed March 01, 2021. http://hdl.handle.net/10339/38514.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Miao, Chuang. “COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION.” 2013. Web. 01 Mar 2021.

Vancouver:

Miao C. COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION. [Internet] [Thesis]. Wake Forest University; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10339/38514.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Miao C. COMPARATIVE STUDIES OF DIFFERENT SYSTEM MODELS FOR ITERATIVE CT IMAGE RECONSTRUCTION. [Thesis]. Wake Forest University; 2013. Available from: http://hdl.handle.net/10339/38514

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations