Imaging

Authors: D. Didierlaurent, MSc, V. Contremoulins, MSc, J-M. Denoix, DVM, PhD and F. Audigié, DVM, PhD
Journal: Veterinary Record

Lateral scintigraphic images of the necks of 12 show jumping horses, 12 thoroughbreds and 12 French trotters were evaluated. Custom-written automatic analysis software was used to segment the regions of the articular processes and vertebral symphyses from C3 to C7 and to calculate their mean radiopharmaceutical uptakes. The uptakes by the two sides of these sound horses were not significantly different, and the uptakes by the vertebral symphyses and articular processes were also similar in the three groups of horses, considering each vertebral level separately.

Authors: Katrien Vanderperren, DVM, PhD; Ann M. Martens, DVM, PhD; Jeroen Declercq, DVM; Luc Duchateau, PhD; Jimmy H. Saunders, DVM, PhD
Journal: Journal of the American Veterinary Medical Association

Objective—To compare clinical usefulness of ultrasonography versus radiography for detection of fragmentation of the dorsal aspect of the metacarpophalangeal (MCP) and metatarsophalangeal (MTP) joints in horses.

Design—Cross-sectional study.

Animals—36 horses with fragmentation of the MCP (n = 19) and MTP (29) joints.

Authors: Gillen, A.; Dyson, S.; Murray, R.
Journal: Equine Veterinary Journal

Reasons for performing study: The results of nuclear scintigraphic examination of the thoracolumbar synovial intervertebral articulations (facet joints) have to date been poorly documented.

Objectives: To establish an objective scintigraphic grading system for the facet joints; to investigate the relationship between the presence or absence of clinical signs of back pain and increased radiopharmaceutical uptake (IRU); and to compare the results of scintigraphy and radiography.

Authors: Down, S.S.; Henson, F.M.D.
Journal: Equine Veterinary Journal

Reasons for performing study: Arthropathy of the caudal cervical articular process joints (APJs) in the horse is documented as a cause of ataxia and paresis secondary to spinal cord compression. Enlargement of the caudal APJs is reported to increase with age, but there are no known associations of any other factors. No association of the degree of APJ enlargement with neurological signs seen has been documented. This study investigated the associations of cervical APJ enlargement at the C5-C6 and C6-C7 articulations with case subject details (breed, age, sex, usage) and clinical signs.

Category: Equine - Imaging - Radiography - Spine
Authors: K. Hette, S. C. Rahal, R. S. Volpi, O. C. M. Pereira Júnior, M. J. Mamprim, V. Colombi da Silva
Journal: Veterinary and Comparative Orthopaedics and Traumatology

The aim of this study was to establish normal reference values of anatomic and mechanical joint angles of the tibia in sheep at different age groups. Eighteen clinically healthy Santa Ines sheep were used. The animals were divided into three equal groups according to age: Group I – from six- to eight-months-old, Group II – 2-years-old, Group III – from three- to five-years-old.

Category: Imaging - Ruminant
Authors: Pauwels, F.E.; Schumacher, J.; Mayhew, I.G.; van Sickle, D. C.
Journal: Equine Veterinary Journal

Neurectomy of the deep branch of the right lateral plantar nerve was performed on a single healthy mature horse. Six weeks after surgery, the horse was subjected to euthanasia and both hind suspensory ligaments harvested. The cross sectional area of the muscular part of the proximal part of the suspensory ligament was measured and assessed for morphological abnormalities in a blinded fashion. There was a clear difference in cross sectional area of the muscular part between treated and control ligament and there was profound neurogenic atrophy of the muscular fibres in the treated ligament.

Category: Equine - Imaging - Ligament - MRI
Authors: Spriet, M.; Zwingenberger, A.
Journal: Equine Veterinary Journal

Reasons for performing study: Hyperintense signal is sometimes observed in ligaments and tendons of the equine foot on standing magnetic resonance examination without associated changes in size and shape. In such cases, the presence of a true lesion or an artifact should be considered. A change in position of a ligament or tendon relative to the magnetic field can induce increased signal intensity due to the magic angle effect.

Category: Equine - Imaging - Ligament - MRI - Tendon
Authors: SARAH M. PUCHALSKI , LARRY D. GALUPPO , CLIFTON P. DREW , ERIK R. WISNER
Journal: Veterinary Radiology & Ultrasound

We compared contrast-enhanced computed tomography (CT) and high field magnetic resonance (MR) imaging in a horse with deep digital flexor tendonopathy. Lesions in the distal extremity were documented grossly and histopathologically. In contrast-enhanced CT, the deep digital flexor tendon lesions were markedly contrast enhancing with evidence of angiogenesis in the core and dorsal border lesions. The lesion morphology was clearly delineated on MR imaging, but without contrast media angiogenesis cannot be identified.

Category: CT - Equine - Imaging - Tendon
Authors: FLORIAN GEBUREK, DrMedVet, ANNA K. RÖTTING, DrMedVet, PhD, Diplomate ACVS & ECVS , and PETER M. STADLER, Prof DrMedVet
Journal: Veterinary Surgery

Objective—To assess agreement between ultrasonography (transcutaneous and transrectal) and standing radiography in horses with fractures in the pelvic region and disorders of the coxofemoral joint.

Study Design—Case series.

Animals—Warmblood horses (n=23) and 2 ponies.

Methods—Medical records (1999–2008) of equids with pelvic or coxofemoral disorders that had pelvic radiography and ultrasonography were retrieved and results of both techniques compared.

Authors: Chris D. Bell, DVM; Rick D. Howard, DVM, PhD, DACVS; D. Scott Taylor, DVM, DACVS; Ed D. Voss, DVM, DACVIM; Natasha M. Werpy, DVM, DACVR
Journal: Journal of the American Veterinary Medical Association

Objective—To determine clinical outcome following intrathecal injection of the podotrochlear (navicular) bursa for signs of foot pain in horses evaluated via magnetic resonance imaging (MRI) and evaluate efficacy of corticosteroids administered with or without hyaluronate.

Design—Retrospective case series.

Animals—23 horses.

Procedures—Data collected included signalment, history, intended use, duration and severity of lameness, results of diagnostic anesthesia, radiographic abnormalities, MRI abnormalities, and outcomes for return to use.

Category: Equine - Imaging - Lameness - MRI - Treatment