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Chuthatep, Suwicha, 2004. Scintigraphy of the Equine Pelvis : detectability of equine pelvic lesions: a phantom study. Second cycle, A1N, A1F or AXX ( AXX). Uppsala: SLU, Dept. of Biomedical Sciences and Veterinary Public Health

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Abstract

Equine skeletal scintigraphy can be used in the diagnosis of pelvic injuries but thick overlying soft tissue is a factor that may decrease the detectability of lesions in this area. The purposes of this study were to examine the effects of soft tissue attenuation on the detectability of lesions and to evaluate the improvement of detectability by using computerized post processing of images.
In this study, an equine pelvic phantom was produced using data from clinically normal horses to simulate the true appearance in a controlled and standardized setup. In an observational study, 11 observers evaluated scintigrams to find out the maximum depth of overlying soft tissue at which a lesion could be distinguished. Scintigrams with varying lesion contrasts, count levels, filtered and unfiltered and in two different colour displays were produced to evaluate factors influencing the detectability.
The result showed that lesions with 130 percent contrast and less were obscured by overlying tissue that was 9 cm or more thick. Increasing the count level from 300 kcounts to 500 kcounts did not improve the lesion detectability. A Metz digital filter increased detectability of the lesion with 120 percent contrast of 50 and 150 kcounts scintigrams.
Colour displays did not influence lesion detectability. The combination of an equine pelvic phantom and an observational study can be used to evaluate factors influencing the detectability in scintigrams. The results in this study show that less intense increase radiopharmaceutical uptake may be difficult to detect due to attenuation of thick overlying soft tissue.

Main title:Scintigraphy of the Equine Pelvis
Subtitle:detectability of equine pelvic lesions: a phantom study
Authors:Chuthatep, Suwicha
Supervisor:UNSPECIFIED
Examiner:UNSPECIFIED
Series:Report/International Master of Science Programme, Faculty of Veterinary Medicine, Swedish University of Agricultural Science
Volume/Sequential designation:38
Year of Publication:2004
Level and depth descriptor:Second cycle, A1N, A1F or AXX
Student's programme affiliation:MSCVE Master of Science Programme in Veterinary Medicine 90 HEC
Department:(VH) > Dept. of Biomedical Sciences and Veterinary Public Health
Keywords:equine pelvis, phantom, soft tissue attenuation, detectability
URN:NBN:urn:nbn:se:slu:epsilon-s-700
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-700
Subjects:Animal diseases
Language:English
Additional Information:Överförd från avhandlingsarkivet / Transferred from the Dissertations and Graduate Theses Archive
Deposited On:11 Nov 2011 14:01
Metadata Last Modified:20 Apr 2012 14:23

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