Magnetic Resonance Imaging of the Normal Equine Larynx

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dc.contributor.authorHenderson, Cortney Eriken
dc.contributor.committeechairSullins, Kenneth E.en
dc.contributor.committeememberPhillips, C. Douglasen
dc.contributor.committeememberMcCutcheon, L. Jillen
dc.contributor.committeememberWhite, Nathaniel A. IIen
dc.contributor.departmentBiomedical and Veterinary Sciencesen
dc.date.accessioned2014-03-14T20:40:54Zen
dc.date.adate2006-09-19en
dc.date.available2014-03-14T20:40:54Zen
dc.date.issued2006-06-22en
dc.date.rdate2006-09-19en
dc.date.sdate2006-06-30en
dc.description.abstractA study was performed to establish the appearance of normal equine laryngeal cartilages using magnetic resonance imaging. Specimens were acquired from clinically normal horses that were euthanized for reasons other than respiratory disease. Three in situ and 5 ex vivo larynges were imaged using a 0.3 Tesla system. Images were obtained in the transverse plane using T1-weighted 3D spin echo, T2-weighted 3D spin echo, T2-weighted gradient echo, short tau inversion recovery (STIR), and proton density spin echo sequences. Five ex vivo larynges were also imaged in the transverse plane using a 1.5 Tesla system, sequences included T1-weighted 3D spin echo, T2-weighted 3D turbo-spin echo, turbo inversion recovery (TIRM), and proton density spin echo sequences. A frozen gross laryngeal specimen was sliced in 5-mm transverse sections for comparison to the MR images. Excellent correlation was found between MR images and the gross transverse sections. Successful imaging was accomplished using both imaging systems; however, the 1.5 Tesla system yielded superior image resolution. The 0.3 Tesla imaging system would accommodate the intact equine head, which was not possible using the 1.5 Tesla MRI system. The internal morphology of the laryngeal cartilages was clearly identified in all imaging sequences obtained. Cartilages were found to differ in signal intensity based on the tissue composition and imaging sequences performed. MRI was determined to be a useful imaging modality for evaluating the cartilage morphology of the equine larynx. Further investigation is required to document pathologic morphology.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-06302006-005527en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06302006-005527/en
dc.identifier.urihttp://hdl.handle.net/10919/33833en
dc.publisherVirginia Techen
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dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectmagnetic resonance imagingen
dc.subjectlarynxen
dc.subjectHorsesen
dc.subjectMRIen
dc.subjectrespiratoryen
dc.titleMagnetic Resonance Imaging of the Normal Equine Larynxen
dc.typeThesisen
thesis.degree.disciplineBiomedical and Veterinary Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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