Use of radiography, computed tomography and magnetic resonance imaging forevaluation of navicular syndrome in the horse

Citation
Wr. Widmer et al., Use of radiography, computed tomography and magnetic resonance imaging forevaluation of navicular syndrome in the horse, VET RAD ULT, 41(2), 2000, pp. 108-116
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Veterinary Medicine/Animal Health
Journal title
VETERINARY RADIOLOGY & ULTRASOUND
ISSN journal
1058-8183 → ACNP
Volume
41
Issue
2
Year of publication
2000
Pages
108 - 116
Database
ISI
SICI code
1058-8183(200003/04)41:2<108:UORCTA>2.0.ZU;2-4
Abstract
Radiographic evaluation of navicular syndrome is problematic because of its inconsistent correlation with clinical signs. Scintigraphy often yields fa lse positive and false negative results and diagnostic ultrasound is of lim ited value. Therefore, we assessed the use of computed tomography and magne tic resonance imaging in a horse with clinical and radiographic signs of na vicular syndrome. Cadaver specimens were examined with spiral computed tomo graphic and high-field magnetic resonance scanners and images were correlat ed with pathologic findings. Radiographic changes consisted of bony remodel ing, which included altered synovial fossae, increased medullary opacity, c yst formation and shape change. These osseous changes were more striking an d more numerous on computed tomographic and magnetic resonance images, They were most clearly defined with computed tomography. Many osseous changes s een with computed tomography and magnetic resonance imaging were not radiog raphically evident. Histologically confirmed soft tissue alterations of the deep digital flexor tendon, impar ligament and marrow were identified with magnetic resonance imaging, but not with conventional radiography, Because of their multiplanar capability and tomographic nature, computed tomograph y and magnetic resonance imaging surpass conventional radiography for navic ular imaging, facilitating earlier, more accurate diagnosis. Current advanc es in imaging technology should make these imaging modalities available to equine practitioners in the future.