Imaging

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: ANNAMARIA NAGY, SUE DYSON
Journal: Veterinary Radiology & Ultrasound

Cadaver carpi of 30 mature horses with no history of carpal or proximal metacarpal pain were examined using low-field (0.27 T) and high-field (1.5 T) magnetic resonance imaging (MRI). Normal MRI anatomy in transverse, sagittal, and dorsal plane images was determined by comparison with anatomical specimens and standard texts. Subchondral bone and cortical bone thickness measurements were obtained from standardised sites.

Category: Equine - Imaging - MRI
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: R. A. R. Perrin, M. T. Launois, L. Brogniez, P. D. Clegg, R. P. C. Coomer, F. G. Desbrosse, J. M. E. F. Vandeweerd
Journal: Equine Veterinary Education

Imaging-assisted orthopaedic surgery is becoming part of routine orthopaedic practice in horses and several techniques have been reported. However, there are no published reports describing the use of intraoperative computed tomography (CT) for surgical guidance and immediate post operative control in the horse. This use of CT in equine orthopaedics is currently limited because of the logistic problems associated with availability of CT scans in surgical theatres as well as concerns over radiation safety.

Category: CT - Equine - Imaging
Authors: Elke Van der Vekens, DVM; Erik H. J. Bergman, DVM; Katrien Vanderperren, DVM, PhD; Els V. Raes, DVM; Sarah M. Puchalski, DVM; Henri J. J. van Bree, DVM, PhD; Jimmy H. Saunders, DVM, PhD
Journal: American Journal of Veterinary Research

Objective—To provide a detailed computed tomography (CT) reference of the anatomically normal equine stifle joint.

Sample—16 hind limbs from 8 equine cadavers; no horses had evidence of orthopedic disease of the stifle joints.

Category: CT - Equine - Imaging
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: A. NAGY, S. DYSON
Journal: Equine Veterinary Journal

Reasons for performing the study: Detailed magnetic resonance imaging (MRI) and histological appearances of the accessory ligament of the deep digital flexor tendon (AL-DDFT) have not been documented previously in detail.

Objectives: To: 1) describe anatomical connections between the AL-DDFT and adjacent structures; 2) describe high-field and low-field MRI and histological appearances of the AL-DDFT in the forelimb of horses with no carpal or proximal metacarpal pain; and 3) assess the relationship between age, breed, gender, height, weight and MRI findings.

Category: Equine - Imaging - Ligament - MRI
Authors: M. BIGGI, S. DYSON
Journal: Equine Veterinary Journal

Reasons for performing study: Distal border fragments of the navicular bone can be seen in lame and nonlame horses and their clinical significance remains open to debate.

Objectives: To describe the magnetic resonance imaging (MRI) appearance of distal border fragments and the adjacent navicular bone. To investigate the relationship between fragments and other abnormalities of the navicular bone and the distal sesamoidean impar ligament (DSIL).

Category: Equine - Imaging - Lameness - MRI
Authors: J. G. FOWLIE, S. P. ARNOCZKY, J. A. STICK, A. P. PEASE
Journal: Equine Veterinary Journal

Reason for performing study: By study of the translocation and deformation of equine menisci throughout the range of motion, it may be possible to identify potential mechanical factors in the pathogenesis of injury to the cranial horn of the medial meniscus.

Objective: To quantitatively document meniscal translocation and deformation using radiographic and MR imaging, and to evaluate for potential variation between the medial and lateral menisci.

Authors: Keren E. Dittmer, Elwyn C. Firth, Keith G. Thompson, Jonathan C. Marshall and Hugh T. Blair
Journal: The Veterinary Journal

An inherited skeletal disease with gross and microscopic features of rickets has been diagnosed in Corriedale sheep in New Zealand. The aim of this study was to quantify the changes present in tibia from sheep with inherited rickets using peripheral quantitative computed tomography. In affected sheep, scans in the proximal tibia, where metaphysis becomes diaphysis, showed significantly greater trabecular bone mineral content (BMC) and bone mineral density (BMD).