Imaging

Authors: MARIEKE ZIMMERMAN, SUE DYSON and RACHEL MURRAY
Journal: Veterinary Radiology and Ultrasound

Back pain is common in horses, but there has been no large-scale in-depth study describing radiographic changes of the spinous processes, the relationship between radiographic and scintigraphic findings, and the effect of size, age, breed, or discipline.

Authors: SUE DYSON, ANNAMARIA NAGY, RACHEL MURRAY
Journal: Veterinary Radiology and Ultrasound

Eight sports horses with unilateral (4) or bilateral (3) forelimb or unilateral hindlimb (1) lameness had subtle radiologic abnormalities of the subchondral bone of the sagittal groove of the proximal phalanx associated with moderate or intense increased radiopharmaceutical uptake. High-field or low-field magnetic resonance (MR) imaging confirmed the presence of a fissure fracture or subchondral and trabecular bone trauma. Seven of eight lesions were located approximately midway between the dorsal and palmar cortices of the proximal phalanx; the eighth was sited more dorsally.

Authors: M. F. BARRETT, D. D. FRISBIE, C. W. McILWRAITH, N. M. WERPY
Journal: Equine Veterinary Journal

Reasons for performing study: While descriptions of the visible soft tissues of the femorotibial joints exist for both arthroscopy and ultrasonography, there are few examples in the literature that discuss in detail the combined findings of these modalities.

Objectives: To further elucidate the ultrasonographic and arthroscopic boundaries of the normal equine femorotibial joints and improve the understanding of the benefits and limitations of each individual modality.

Authors: S. A. VALLANCE, R. J. W. BELL, M. SPRIET, P. H. KASS, S. M. PUCHALSKI
Journal: Equine Veterinary Journal

Reasons for performing study: To date, few reports exist comparing magnetic resonance imaging (MRI) and computed tomography (CT) for imaging of the equine distal limb, yet clinicians are required to decide which modality to use regularly.

Objectives: To report and compare anatomic visualisation scores obtained for CT, contrast enhanced CT (CECT) and standing low-field MRI (LFMRI) in the equine foot.

Hypothesis: Anatomic visualisation score discrepancies would exist between CT, CECT and LFMRI.

Authors: A.-G. Dupays, V. Coudry, J.-M. Denoix
Journal: Equine Veterinary Education

Ultrasonographic examination of the dorsal aspect of the distal interphalangeal joint is part of the routine examination of the foot structures. The purpose of this paper is to describe the ultrasonographic anatomy of the area, and normal transverse and longitudinal images. Clinical cases are presented to illustrate abnormal findings and lesions of the dorsal aspect of the joint.

Category: Equine - Imaging - Ultrasound
Authors: M. Seignour, V. Coudry, R. Norris, J-M. Denoix
Journal: Equine Veterinary Education

The purpose of this paper is to present a comprehensive ultrasonographic technique to image the palmar/plantar aspect of the fetlock in the horse, from the manica flexoria (MF) down to the base of the proximal sesamoid bones (PSBs) and to describe the normal images. Ultrasonography, in combination with radiography, is the technique of choice to identify and document tendon and ligament injuries in routine practice and has been shown adequate for evaluating the palmar/plantar aspect of the fetlock.

Category: Equine - Imaging - Ultrasound
Authors: Els V. Raes, DVM; Eric H. J. Bergman, DVM; Henk van der Veen, DVM; Katrien Vanderperren, DVM, PhD; Elke Van der Vekens, DVM; Jimmy H. Saunders, DVM, PhD
Journal: American Journal of Veterinary Research

Objective—To compare computed tomography (CT) images of equine tarsi with cross-sectional anatomic slices and evaluate the potential of CT for imaging pathological tarsal changes in horses.

Sample—6 anatomically normal equine cadaveric hind limbs and 4 tarsi with pathological changes.

Authors: Liberty M. Getman DVM, Diplomate ACVS, Elizabeth J. Davidson DVM, Diplomate ACVS, Michael W. Ross DVM, Diplomate ACVS, Midge Leitch VMD, Diplomate ACVS, Dean W. Richardson DVM, Diplomate ACVS
Journal: Veterinary Surgery

Objectives: To (1) describe the computed tomography (CT) and magnetic resonance imaging (MRI) appearance of keratomas; (2) describe a CT- or MRI-assisted partial hoof wall resection technique for removal of keratomas; and (3) evaluate the morbidity and postoperative outcome of these horses.

Study Design: Case series.

Animals: Horses (n=10) with keratoma.

Category: CT - Equine - Imaging - MRI - Podiatry
Authors: G. D. TROPE, G. A. ANDERSON, R. C. WHITTON
Journal: Equine Veterinary Journal

Reasons for performing study: The effect of palmar osteochondral disease lesions on performance of Thoroughbred (TB) racehorses is unclear. There is a need to describe patterns of radiopharmaceutical uptake (IRU) in fetlock joints of TB racehorses and to evaluate post scintigraphy performance.

Hypotheses: IRU in the metacarpal (MC) and metatarsal (MT) condyles is more common than IRU in the parasagittal grooves and is associated with poorer post diagnosis performance than controls.

Authors: G. D. TROPE, G. A. ANDERSON, R. C. WHITTON
Journal: Equine Veterinary Journal

Reasons for performing study: The effect of palmar osteochondral disease lesions on performance of Thoroughbred (TB) racehorses is unclear. There is a need to describe patterns of radiopharmaceutical uptake (IRU) in fetlock joints of TB racehorses and to evaluate post scintigraphy performance.

Hypotheses: IRU in the metacarpal (MC) and metatarsal (MT) condyles is more common than IRU in the parasagittal grooves and is associated with poorer post diagnosis performance than controls.