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You searched for +publisher:"Virginia Tech" +contributor:("Pereira, Carolina Ricco"). Showing records 1 – 2 of 2 total matches.

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Virginia Tech

1. 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

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

APA (6th 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 (16th 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 October 24, 2020. http://hdl.handle.net/10919/34046.

MLA Handbook (7th Edition):

Saulnier, Diane Christine. “Imaging of the Canine Heart Using Non ECG-Gated and ECG-Gated 64 Multidetector Computed Tomography.” 2012. Web. 24 Oct 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 Oct 24]. 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


Virginia Tech

2. Blumerich, Celeste Ann. Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay.

Degree: MS, Veterinary Medical Sciences, 2012, Virginia Tech

Recurrent Airway Obstruction (RAO)-affected horses experience bronchoconstriction and airway inflammation in response to inhalation of irritants including hay molds. Steaming hay reduces fungal content, but the effect on the antigenic potential has not been investigated. We tested the hypothesis that RAO-affected horses develop less severe clinical disease when fed steamed versus non-steamed hay and this reduction coincides with decreased hay fungal content. Six RAO-affected horses in clinical remission were divided in two groups and fed steamed or non-steamed hay for 10 days using a two-way cross-over design. Hay was steamed using a commercial hay-steamer. Clinical assessment was performed daily. Full assessment, including airway endoscopy, tracheal mucous scores and maximal change in pleural pressure, was performed on days 1, 5, and 10. Bronchial fluid sampling and cytology were performed on days 1 and 10. Hay core samples were collected pre- and post-steaming and cultured to determine fungal and bacterial concentrations. Statistical analysis was based on data distribution and quantity and performed using SAS®. P-value <0.05 was significant. Steaming significantly decreased the number of bacterial and fungal colony-forming-units in hay. Horses fed non-steamed hay experienced a significant increase in clinical score and a trend towards airway neutrophilia, while parameters were unchanged in horses fed steamed hay. Only horses fed non-steamed hay experienced a significant increase in tracheal mucous score. Horses fed steamed hay gained significantly more weight compared to horses fed non-steamed hay, even though the amount of hay consumed not greater on a dry matter basis. These results indicate that steaming reduces the RAO-affected horseâ s response to hay which coincides with a reduction in viable fungal content of hay. Advisors/Committee Members: Buechner-Maxwell, Virginia A. (committeechair), Pereira, Carolina Ricco (committee member), Hodgson, Jennifer L. (committee member), Scarratt, W. Kent (committee member), Wilson, Katherine E. (committee member).

Subjects/Keywords: Recurrent Airway Obstruction; Hay; Steaming; Fungus; Horses

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

APA (6th Edition):

Blumerich, C. A. (2012). Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/43534

Chicago Manual of Style (16th Edition):

Blumerich, Celeste Ann. “Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay.” 2012. Masters Thesis, Virginia Tech. Accessed October 24, 2020. http://hdl.handle.net/10919/43534.

MLA Handbook (7th Edition):

Blumerich, Celeste Ann. “Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay.” 2012. Web. 24 Oct 2020.

Vancouver:

Blumerich CA. Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay. [Internet] [Masters thesis]. Virginia Tech; 2012. [cited 2020 Oct 24]. Available from: http://hdl.handle.net/10919/43534.

Council of Science Editors:

Blumerich CA. Comparison of Airway Response in Recurrent Airway Obstruction-Affected Horses Fed Steamed Versus Non-steamed Hay. [Masters Thesis]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/43534

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