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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Lillie EM. Validation and Evaluation of Cortical and Full Skull Thickness Changes with Age and Sex. [Internet] [Thesis]. Wake Forest University; 2014. [cited 2020 Feb 19]. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Walb MC. Low Dose Dosimetry and Radiation Response in Rodent Models. [Internet] [Thesis]. Wake Forest University; 2016. [cited 2020 Feb 19]. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Delgado D(C. Iterative reconstruction methods of CT images using a statistical framework. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2020 Feb 19]. 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. [No author]. Development of the particle technology research portfolio online reporting tool.

Degree: 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):

author], [. (2017). Development of the particle technology research portfolio online reporting tool. (Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/10055

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):

author], [No. “Development of the particle technology research portfolio online reporting tool. ” 2017. Thesis, Baylor University. Accessed February 19, 2020. http://hdl.handle.net/2104/10055.

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

MLA Handbook (7^th Edition):

author], [No. “Development of the particle technology research portfolio online reporting tool. ” 2017. Web. 19 Feb 2020.

Vancouver:

author] [. Development of the particle technology research portfolio online reporting tool. [Internet] [Thesis]. Baylor University; 2017. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/2104/10055.

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

Council of Science Editors:

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

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

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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Lemieux G. Development of a Three Dimensional Maxillary Superimposition Plane Using Cone Beam Computed Tomography. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2020 Feb 19]. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

A P. Certain investigations on texture Analysis techniques for segmentation And classification of brain CT images;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 19]. 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

University of Edinburgh

8. 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 February 19, 2020. http://hdl.handle.net/1842/16455.

MLA Handbook (7^th Edition):

MacDonald, Alisdair John. “Assessment of muscle wasting.” 2015. Web. 19 Feb 2020.

Vancouver:

MacDonald AJ. Assessment of muscle wasting. [Internet] [Doctoral dissertation]. University of Edinburgh; 2015. [cited 2020 Feb 19]. 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

Penn State University

9. Lee, Chung-Hao. PARAMETRIC STUDY OF FACTORS AFFECTING.

Degree: PhD, Petroleum and Natural Gas Engineering, 2010, Penn State University

URL: https://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.

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

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APA (6^th Edition):

Lee, C. (2010). PARAMETRIC STUDY OF FACTORS AFFECTING. (Doctoral Dissertation). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/11694

Chicago Manual of Style (16^th Edition):

Lee, Chung-Hao. “PARAMETRIC STUDY OF FACTORS AFFECTING.” 2010. Doctoral Dissertation, Penn State University. Accessed February 19, 2020. https://etda.libraries.psu.edu/catalog/11694.

MLA Handbook (7^th Edition):

Lee, Chung-Hao. “PARAMETRIC STUDY OF FACTORS AFFECTING.” 2010. Web. 19 Feb 2020.

Vancouver:

Lee C. PARAMETRIC STUDY OF FACTORS AFFECTING. [Internet] [Doctoral dissertation]. Penn State University; 2010. [cited 2020 Feb 19]. Available from: https://etda.libraries.psu.edu/catalog/11694.

Council of Science Editors:

Lee C. PARAMETRIC STUDY OF FACTORS AFFECTING. [Doctoral Dissertation]. Penn State University; 2010. Available from: https://etda.libraries.psu.edu/catalog/11694

10. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

Virginia Tech

12. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

University of Sydney

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

Degree: 2019, University of Sydney

URL: https://ses.library.usyd.edu.au/handle/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 (6^th Edition):

Gnalini, S. (2019). Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart . (Thesis). University of Sydney. Retrieved from https://ses.library.usyd.edu.au/handle/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 February 19, 2020. https://ses.library.usyd.edu.au/handle/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. 19 Feb 2020.

Vancouver:

Gnalini S. Understanding The Relationship Between The Electrical And Anatomical Axis Of The Heart . [Internet] [Thesis]. University of Sydney; 2019. [cited 2020 Feb 19]. Available from: https://ses.library.usyd.edu.au/handle/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: https://ses.library.usyd.edu.au/handle/2123/21288

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

University of Sydney

14. 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 (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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Ayoub C. Evaluation Of Semi-Quantitative Measures Of Coronary Atherosclerosis Burden By Computed Tomography Angiography . [Internet] [Thesis]. University of Sydney; 2019. [cited 2020 Feb 19]. 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

Baylor University

15. [No author]. Chord length methods for Proton Computed Tomography.

Degree: 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):

author], [. (2017). Chord length methods for Proton Computed Tomography. (Thesis). Baylor University. Retrieved from http://hdl.handle.net/2104/10177

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):

author], [No. “Chord length methods for Proton Computed Tomography. ” 2017. Thesis, Baylor University. Accessed February 19, 2020. http://hdl.handle.net/2104/10177.

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

MLA Handbook (7^th Edition):

author], [No. “Chord length methods for Proton Computed Tomography. ” 2017. Web. 19 Feb 2020.

Vancouver:

author] [. Chord length methods for Proton Computed Tomography. [Internet] [Thesis]. Baylor University; 2017. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/2104/10177.

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

Council of Science Editors:

author] [. Chord length methods for Proton Computed Tomography. [Thesis]. Baylor University; 2017. Available from: http://hdl.handle.net/2104/10177

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

University of Ontario Institute of Technology

16. Brooks, Martin. A survey of algebraic algorithms in computerized tomography.

Degree: 2010, University of Ontario Institute of Technology

URL: http://hdl.handle.net/10155/107

► X-ray computed tomography (CT) is a medical imaging framework. It takes measured projections of X-rays through two-dimensional cross-sections of an object from multiple angles and… (more)

Subjects/Keywords: Algebraic reconstruction; Medical imaging; Computed tomography (CT)

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APA (6^th Edition):

Brooks, M. (2010). A survey of algebraic algorithms in computerized tomography. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/107

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):

Brooks, Martin. “A survey of algebraic algorithms in computerized tomography.” 2010. Thesis, University of Ontario Institute of Technology. Accessed February 19, 2020. http://hdl.handle.net/10155/107.

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

MLA Handbook (7^th Edition):

Brooks, Martin. “A survey of algebraic algorithms in computerized tomography.” 2010. Web. 19 Feb 2020.

Vancouver:

Brooks M. A survey of algebraic algorithms in computerized tomography. [Internet] [Thesis]. University of Ontario Institute of Technology; 2010. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10155/107.

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

Council of Science Editors:

Brooks M. A survey of algebraic algorithms in computerized tomography. [Thesis]. University of Ontario Institute of Technology; 2010. Available from: http://hdl.handle.net/10155/107

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

University of Ghana

17. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

University of Alberta

18. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

University of Plymouth

19. Clayton, Benjamin James. Advanced applications of cardiac computed tomography for the difficult-to-image patient.

Degree: PhD, 2015, University of Plymouth

URL: http://hdl.handle.net/10026.1/4188

► Throughout the development of computed tomographic (CT) imaging the challenges of capturing the heart, with its perpetual, vigorous motion, and in particular the tiny detail… (more)

Subjects/Keywords: 616.1; Computed tomography; Cardiac imaging; Cardiology

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APA (6^th Edition):

Clayton, B. J. (2015). Advanced applications of cardiac computed tomography for the difficult-to-image patient. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/4188

Chicago Manual of Style (16^th Edition):

Clayton, Benjamin James. “Advanced applications of cardiac computed tomography for the difficult-to-image patient.” 2015. Doctoral Dissertation, University of Plymouth. Accessed February 19, 2020. http://hdl.handle.net/10026.1/4188.

MLA Handbook (7^th Edition):

Clayton, Benjamin James. “Advanced applications of cardiac computed tomography for the difficult-to-image patient.” 2015. Web. 19 Feb 2020.

Vancouver:

Clayton BJ. Advanced applications of cardiac computed tomography for the difficult-to-image patient. [Internet] [Doctoral dissertation]. University of Plymouth; 2015. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/10026.1/4188.

Council of Science Editors:

Clayton BJ. Advanced applications of cardiac computed tomography for the difficult-to-image patient. [Doctoral Dissertation]. University of Plymouth; 2015. Available from: http://hdl.handle.net/10026.1/4188

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

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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Gharge S. Segmentation of Medical Images. [Internet] [Thesis]. INFLIBNET; 2013. [cited 2020 Feb 19]. 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

21. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

titus A. An intelligent framework for clinical decision making from lung CT slices;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 19]. 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

22. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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

Rochester Institute of Technology

23. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Kuhfahl M. Emulating the volume of pulminary nodules: A Quantitative approach. [Internet] [Thesis]. Rochester Institute of Technology; 2012. [cited 2020 Feb 19]. 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 Rochester

24. Johnson, Aimee Michelle; Reeder, Jay E. Bladder Cancer: Sex Matters.

Degree: PhD, 2009, University of Rochester

URL: http://hdl.handle.net/1802/6615

► The growing elderly population in the United States has led to a greater number of bladder cancer patients and bladder cancer deaths in the past… (more)

▼ The growing elderly population in the United States has led to a greater number of bladder cancer patients and bladder cancer deaths in the past several years. Mitogenic signaling pathways, specifically the receptor tyrosine kinase erbB2-mediated pathway, are misregulated in bladder cancer, leading to a greater replicative potential in cells that overexpress such mediators. Since erbB2 has been shown to be overexpressed in nearly 50% of bladder cancers, a mouse model of bladder cancer was created to overexpress erbB2 spatially and temporally. While erbB2 RNA expression was induced in this mouse model and papillary growths in the bladder were noted, erbB2 overexpression alone seemed insufficient for bladder tumorigenesis. It may be that additional mitogenic, cell cycle regulatory, and apoptotic pathways need to be involved. Several different animal models of bladder cancer have been utilized in the past four decades, although none of them have been able to reliably detect, measure, and monitor tumors in vivo, instead relying on serial sacrifice. To eliminate the need for such cumbersome experiments, which introduce the necessity for large numbers of animals and are subject to inter-animal differences, hematuria and voiding function analyses were employed to detect bladder cancer, and non-invasive cone beam computed tomography was used to measure and monitor tumors in vivo. While hematuria was able to detect the presence of bladder tumors in mice, it did not correlate with the severity of the cancer. Furthermore, voiding function did not change as tumors grew in mouse bladders. Cone beam computed tomography, on the other hand, was able to detect the presence of exophytic bladder tumors in mice beginning at 24 weeks of age, and longitudinal studies confirmed that tumor growth could be monitored non-invasively over the following eight weeks. This non-invasive method may provide a means to reduce the number of animals needed for bladder tumorigenesis studies by allowing each animal to serve as its own control in longitudinal studies rather than employing serial sacrifice techniques. Steroid hormones influence mitogenic signaling pathways, apoptosis, and cell cycle checkpoints, and it has long been known that the incidence of bladder cancer in men is several times greater than in women (incidence differential of 4:1, men:women), a difference that cannot be attributed to environmental or lifestyle factors alone. It is also known that castration reduces the incidence of chemically-induced bladder cancer in rodents; however, it is unclear if this effect is due to hormonal influences on activation/deactivation of carcinogens or a direct affect on urothelial cell proliferation or other malignant processes. The work presented in this thesis examined the effect of castration on bladder cancer growth in UPII-SV40T transgenic mice, which express the SV40 T antigen specifically in urothelium and reliably develop bladder cancer. Cone beam computed tomography was used to measure exophytic tumor growth in the bladder. Male mice…

Subjects/Keywords: Computed Tomography; Steroid Hormones; Bladder Cancer; Castration

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

APA (6^th Edition):

Johnson, Aimee Michelle; Reeder, J. E. (2009). Bladder Cancer: Sex Matters. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/6615

Chicago Manual of Style (16^th Edition):

Johnson, Aimee Michelle; Reeder, Jay E. “Bladder Cancer: Sex Matters.” 2009. Doctoral Dissertation, University of Rochester. Accessed February 19, 2020. http://hdl.handle.net/1802/6615.

MLA Handbook (7^th Edition):

Johnson, Aimee Michelle; Reeder, Jay E. “Bladder Cancer: Sex Matters.” 2009. Web. 19 Feb 2020.

Vancouver:

Johnson, Aimee Michelle; Reeder JE. Bladder Cancer: Sex Matters. [Internet] [Doctoral dissertation]. University of Rochester; 2009. [cited 2020 Feb 19]. Available from: http://hdl.handle.net/1802/6615.

Council of Science Editors:

Johnson, Aimee Michelle; Reeder JE. Bladder Cancer: Sex Matters. [Doctoral Dissertation]. University of Rochester; 2009. Available from: http://hdl.handle.net/1802/6615

North Carolina State University

25. 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 February 19, 2020. 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. 19 Feb 2020.

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 2020 Feb 19]. 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 Western Australia

26. Mitchell, Warren John. A morphometric analysis of variation in the temporal bone and cranium in a normal population.

Degree: PhD, 2011, University of Western Australia

URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=32821&local_base=GEN01-INS01

►

[Truncated abstract] The temporal bone contributes to the walls and floor of the cranium, houses the organs of hearing and balance, and is perforated by… (more)

▼

[Truncated abstract] The temporal bone contributes to the walls and floor of the cranium, houses the organs of hearing and balance, and is perforated by numerous foramina and canals for the passage of nerves and blood vessels. The aim of the current study was to analyse morphological variation in the human cranium and particularly the temporal bone in a normal population of Australian adults by morphometric techniques as an aid to a better clinical understanding of their anatomy. As such, many issues were explored but there was no unifying hypothesis. Computed tomography scans of 101 adult human crania were loaded into the Amira medical imaging software to extract three-dimensional coordinates of 130 landmarks on the temporal bone and cranium. These data were subjected to traditional morphometric and geometric morphometric analyses (GMA) to explore patterns of shape variation with respect to differences in cranial size, sex and age. It was found that GMA is a more sensitive discriminator of shape differences than is traditional morphometric analysis. The results indicate that most measurements of the cranium scale with size, but some parts of the middle and inner ear are relatively constant irrespective of cranial size. The GMA also found that large crania tend to be more extensively pneumatised than small crania. Moreover, while the centroid size of temporal bone pneumatisation is not sexually dimorphic, there are subtle sex differences in the posterior and inferior limits of pneumatisation A finding of the age analysis was that the lateral portions of the temporal bone tend to undergo an inferior displacement in the elderly. The GMA found there were some areas where age and sex interact in unusual ways such that sex differences are either reduced or became more marked with age...

[Truncated abstract] The temporal bone contributes to the walls and floor of the cranium, houses the organs of hearing and balance, and is perforated by numerous foramina and canals for the passage of nerves and blood vessels. The aim of the current study was to analyse morphological variation in the human cranium and particularly the temporal bone in a normal population of Australian adults by morphometric techniques as an aid to a better clinical understanding of their anatomy. As such, many issues were explored but there was no unifying hypothesis. Computed tomography scans of 101 adult human crania were loaded into the Amira medical imaging software to extract three-dimensional coordinates of 130 landmarks on the temporal bone and cranium. These data were subjected to traditional morphometric and geometric morphometric analyses (GMA) to explore patterns of shape variation with respect to differences in cranial size, sex and age. It was found that GMA is a more sensitive discriminator of shape differences than is traditional morphometric analysis. The results indicate that most measurements of the cranium scale with size, but some parts of the middle and inner ear are relatively constant irrespective of cranial size. The GMA also…

Subjects/Keywords: Cranium; Variation; Temporal bone; Morphometric; Computed tomography

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APA (6^th Edition):

Mitchell, W. J. (2011). A morphometric analysis of variation in the temporal bone and cranium in a normal population. (Doctoral Dissertation). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=32821&local_base=GEN01-INS01

Chicago Manual of Style (16^th Edition):

Mitchell, Warren John. “A morphometric analysis of variation in the temporal bone and cranium in a normal population.” 2011. Doctoral Dissertation, University of Western Australia. Accessed February 19, 2020. http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=32821&local_base=GEN01-INS01.

MLA Handbook (7^th Edition):

Mitchell, Warren John. “A morphometric analysis of variation in the temporal bone and cranium in a normal population.” 2011. Web. 19 Feb 2020.

Vancouver:

Mitchell WJ. A morphometric analysis of variation in the temporal bone and cranium in a normal population. [Internet] [Doctoral dissertation]. University of Western Australia; 2011. [cited 2020 Feb 19]. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=32821&local_base=GEN01-INS01.

Council of Science Editors:

Mitchell WJ. A morphometric analysis of variation in the temporal bone and cranium in a normal population. [Doctoral Dissertation]. University of Western Australia; 2011. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=32821&local_base=GEN01-INS01

Universiteit Utrecht

27. 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 February 19, 2020. http://dspace.library.uu.nl:8080/handle/1874/297248.

MLA Handbook (7^th Edition):

Contini, E. “Rib cage segmentation in CT scans.” 2014. Web. 19 Feb 2020.

Vancouver:

Contini E. Rib cage segmentation in CT scans. [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2020 Feb 19]. 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

28. 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 February 19, 2020. 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. 19 Feb 2020.

Vancouver:

Willemink MJ. Iterative Reconstruction for Cardiopulmonary Computed Tomography. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2015. [cited 2020 Feb 19]. 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 Manchester

29. Amos, Mathew. Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures.

Degree: Thesis (Eng.D.), 2011, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/advanced-industrial-xray-computed-tomography-for-defect-detection-and-characterisation-of-composite-structures(7da52044-004e-4253-b1d2-0cb1e85ce28d).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538397

► X-ray Computer Tomography (CT) is well suited to the inspection of Fibre-Reinforced-Plastic (FRP) composite materials. However, a range of limitations currently restrict its uptake. The… (more)

▼ X-ray Computer Tomography (CT) is well suited to the inspection of Fibre-Reinforced-Plastic (FRP) composite materials. However, a range of limitations currently restrict its uptake. The aim of the present research was to develop advanced inspection procedures that overcome these limitations and increase the scope of composite structures that can be inspected by industrial cone beam CT. Region of Interest (ROI) CT inspection of FRP laminated panels was investigated and two data completion methods developed to overcome reconstruction errors caused by truncated projection data. These allow accurate, highly magnified regions to be reconstructed on objects that extend beyond the Field-of-View (FOV) of the detector. The first method extended the truncated projection data using a cosine signal tailing off to zero attenuation. This method removed the strong 'glowing' artefacts but an inherent error existed across the reconstructed ROI. This did not affect the defect detectability of the inspection but was viewed as problematic for applications requiring accurate density measurements. The second method used prior knowledge of the test object so that a model could be created to estimate the missing data. This technique removed errors associated with ROI reconstruction thus significantly improving the accuracy. Techniques for extending the FOV were developed and applied to the inspection of FRP wind turbine blades; over 1.5X larger than the conventional scanning FOV. Two data completion methods were developed requiring an asymmetrically positioned detector. The first was based on the cosine tailing technique and the second used fan beam ray redundancy properties to estimate the missing data. Both produced accurate reconstructions for the 'offset' projection data, demonstrating that it was possible to approximately double the FOV. The cosine tailing method was found to be the more reliable. A dual energy image CT technique was developed to extend the optimum dynamic range and improve defect detectability for multi-density objects. This was applied to FRP composite/Titanium lap joints showing improved detectability of both volumetric and planar defects within the low density FRP. The dual energy procedure was validated using statistical performance measures on a specially fabricated multi-density phantom. The results showed a significant improvement in the detail SNR when compared to conventional CT scans.

Subjects/Keywords: 624.18; X-ray Computed Tomography; Composites

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APA (6^th Edition):

Amos, M. (2011). Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/advanced-industrial-xray-computed-tomography-for-defect-detection-and-characterisation-of-composite-structures(7da52044-004e-4253-b1d2-0cb1e85ce28d).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538397

Chicago Manual of Style (16^th Edition):

Amos, Mathew. “Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures.” 2011. Doctoral Dissertation, University of Manchester. Accessed February 19, 2020. https://www.research.manchester.ac.uk/portal/en/theses/advanced-industrial-xray-computed-tomography-for-defect-detection-and-characterisation-of-composite-structures(7da52044-004e-4253-b1d2-0cb1e85ce28d).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538397.

MLA Handbook (7^th Edition):

Amos, Mathew. “Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures.” 2011. Web. 19 Feb 2020.

Vancouver:

Amos M. Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2020 Feb 19]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/advanced-industrial-xray-computed-tomography-for-defect-detection-and-characterisation-of-composite-structures(7da52044-004e-4253-b1d2-0cb1e85ce28d).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538397.

Council of Science Editors:

Amos M. Advanced industrial X-ray computed tomography for defect detection and characterisation of composite structures. [Doctoral Dissertation]. University of Manchester; 2011. Available from: https://www.research.manchester.ac.uk/portal/en/theses/advanced-industrial-xray-computed-tomography-for-defect-detection-and-characterisation-of-composite-structures(7da52044-004e-4253-b1d2-0cb1e85ce28d).html ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538397

Louisiana State University

30. Silkwood, Justin. Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose.

Degree: MS, Physical Sciences and Mathematics, 2013, Louisiana State University

URL: etd-02202013-132920 ; https://digitalcommons.lsu.edu/gradschool_theses/1332

► Purpose: Adaptive filtration facilitates spectral breast CT by decreasing count rate and dynamic range requirements of photon counting detectors. This project investigated the effect of… (more)

Subjects/Keywords: Spectral; Computed Tomography; Adaptive Filtration; Bow Tie

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APA (6^th Edition):

Silkwood, J. (2013). Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose. (Masters Thesis). Louisiana State University. Retrieved from etd-02202013-132920 ; https://digitalcommons.lsu.edu/gradschool_theses/1332

Chicago Manual of Style (16^th Edition):

Silkwood, Justin. “Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose.” 2013. Masters Thesis, Louisiana State University. Accessed February 19, 2020. etd-02202013-132920 ; https://digitalcommons.lsu.edu/gradschool_theses/1332.

MLA Handbook (7^th Edition):

Silkwood, Justin. “Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose.” 2013. Web. 19 Feb 2020.

Vancouver:

Silkwood J. Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose. [Internet] [Masters thesis]. Louisiana State University; 2013. [cited 2020 Feb 19]. Available from: etd-02202013-132920 ; https://digitalcommons.lsu.edu/gradschool_theses/1332.

Council of Science Editors:

Silkwood J. Spectral breast CT : effect of adaptive filtration on CT numbers, CT noise, and CT dose. [Masters Thesis]. Louisiana State University; 2013. Available from: etd-02202013-132920 ; https://digitalcommons.lsu.edu/gradschool_theses/1332

Open Access Theses and Dissertations