Radiography

Authors: Daniel P. Fogarty, Benjamin Reinhart, Tochko Tzvetkov, Ivan Nesch, Cooper Williams
Journal: Journal of Equine Veterinary Science

We describe and demonstrate the first application of a laboratory-based diffraction-enhanced X-ray imaging instrument for noninvasive equine imaging. A formalin-preserved disarticulated forelimb from a near-term aborted miniature horse fetus was imaged with diffraction-enhanced X-ray imaging.

Category: Equine - Imaging - Radiography
Authors: MELISSA A. JACKSON, ANDREW L. VIZARD, GARRY A. ANDERSON, JOHN S. MATTOON, ROGER B. LAVELLE, BRYAN T. SMITHENSON, NOLA V. LESTER, ANDREW F. CLARKE, ROBERT C. WHITTON
Journal: Veterinary Radiology & Ultrasound

We aimed to identify common mistakes made when radiographing yearling sale horses. Radiographic examinations from repositories at eight yearling sales held in Australia in 2003 were assessed by one of four veterinary radiology specialists. Each radiographic examination consisted of a maximum of 34 radiographs. Each radiograph was assessed for errors associated with movement, exposure, positioning, labeling or marker placement, and processing, and categorized as either ideal, less than ideal or nondiagnostic.

Category: Equine - Imaging - Radiography
Authors: H. D. O'Neill and B. M. Bladon
Journal: Veterinary Record

Records of horses admitted to a veterinary surgery in the UK for lameness investigation during 2000 to 2008 were reviewed. Twenty-one horses were identified with both scintigraphic and radiological evidence of enostosis-like lesions (ELLs), in which 68 individual foci of increased radiopharmaceutical uptake were confirmed in 57 long bones. The presenting lameness was attributed to ELLs in 15 of 21 (71 per cent) horses; the remainder were thought to be incidental findings.

Authors: S. Claerhoudt, F. Pille, K. Vanderperren, S. Hauspie, L. Duchateau, E. Van der Vekens, J. H. Saunders
Journal: Veterinary and Comparative Orthopaedics and Traumatology

Objectives: To investigate whether in navicular bones (NB) from warmbloods, distal border fragmentation is associated with the shape of the proximal articular border or other radiological findings. Methods: Radiographs of the front feet of 325 normal, subadult horses presented for admission as breeding stallions were reviewed. Results: The proximal articular border of the total of 650 NB was classified as straight (n = 278), convex (n = 184), undulating (n = 147) or concave (n = 41). Distal border fragments were present in 57 NB (8.8%).

Category: Bone - Equine - Radiography
Authors: REID TYSON, DOUGLAS C. SMILEY, ROBERT S. PLEASANT, GREGORY B. DANIEL
Journal: Veterinary Radiology & Ultrasound

Hand holding of portable X-ray units is common in large animal ambulatory veterinary practice. Portable X-ray equipment manuals, veterinary teaching institutions, and state regulations discourage, or prohibit, hand holding of portable X-ray units. Our goal was to quantify surface radiation leakage of a typical portable X-ray unit and to measure operator exposure at simulated hand and collar positions during imaging of the equine distal extremity. Each exposure for the study was performed at 80 kVp and 7.5 mAs and repeated 10 times.

Category: Equine - Radiography
Authors: S. Dyson
Journal: Equine Veterinary Education

Accurate radiological interpretation of a navicular bone requires at least a true lateromedial (LM) image, dorsoproximal-palmarodistal oblique (DPr-PaDiO) and palmaroproximal-palmarodistal oblique (PaPr-PaDIO) images. Additional information is sometimes acquired from a weightbearing dorsopalmar (DPa) image. The LM image is used to assess thickness of the palmar cortex, proximal or distal extension of the palmar cortex, demarcation between the cortex and spongiosa and the presence of periarticular osteophytes.

Category: Bone - Equine - Radiography
Authors: S. Hauspie (1), A. Martens, J. Declercq, V. Busoni, K. Vanderperren, H. van Bree, J. H. Saunders
Journal: Veterinary and Comparative Orthopaedics and Traumatology

Objectives: To describe the radiographic appearance of the dorsoproximal aspect of the sagittal ridge of the third metacarpal/metatarsal bone in Warmblood horses. Methods: The lateromedial radiographic projections of the metacarpo-/metatarsophalangeal joints performed on horses as a part of stallion selection were used. The dorsal aspect of the distal third metacarpal/metatarsal bone was divided in two areas. The appearance of the bone surface in area I was classified as normal, irregular, notch, indentation and lucency.

Category: Equine - Radiography
Authors: VALERIE SIMON, SUE J. DYSON
Journal: Veterinary Radiology and Ultrasound

Our purpose was to describe the variation of the radiologic appearance of the carpus of horses of different breeds, discipline, and gender with lameness related to the carpus and control horses, with particular reference to the ulnar carpal bone. Two hundred and eighty-six sets of carpal radiographs from 222 horses were analyzed. Breed, gender, discipline, and cause of lameness were recorded.

Category: Equine - Lameness - Radiography
Authors: M. BIGGI, S. DYSON
Journal: Equine Veterinary Journal

Reasons for performing study: There are no data concerning the accuracy of conventional and computed or digital radiography for evaluation of the equine foot.

Objectives: To compare conventional film-screen and computed radiography with magnetic resonance imaging (MRI) for detection of distal border fragments of the navicular bone; and to establish which type of fragment was more likely to be detected radiologically.

Authors: Stephanie A. Preston, MSc; Dana N. Zimmel, DVM, DACVIM, DABVP; Terese L. Chmielewski, PT, PhD; Troy N. Trumble, DVM, PhD; Murray P. Brown, DVM, MSc; Joseph C. Boneau, DVM; Jorge A. Hernandez, DVM, MPVM, PhD
Journal: Journal of the American Veterinary Medical Association

Objective—To estimate prevalences of various presale radiographic findings and of presale arthroscopy in horses offered for sale at the 2006 Keeneland September yearling sale and to compare sales prices between yearlings with and without various presale radiographic findings or a history of arthroscopy.

Animals—397 Thoroughbred yearlings.

Design—Cross-sectional study.

Category: Equine - Radiography