Imaging

Authors: Carla N. Aguirre, Jesús Talavera, María Josefa Fernández del Palacio
Journal: Journal of the American Veterinary Medical Association

Objective—To evaluate the usefulness of Doppler ultrasonography as a method to assess changes in digital vascular dynamics in horses with systemic inflammatory response syndrome (SIRS) or laminitis.

Design—Cross-sectional study.

Animals—42 adult Andalusian horses.

Authors: C. P. Crijns, A. Martens, H.-J. Bergman, H. van der Veen, L. Duchateau, H. J. J. van Bree and I. M. V. L. Gielen
Journal: Equine Veterinary Journal

Summary
Reasons for performing study

Computed tomography (CT) is increasingly accessible in equine referral hospitals.
Objectives

To document the level of agreement within and between radiography and CT in characterising equine distal limb fractures.
Study design

Retrospective descriptive study.
Methods

Authors: M. R. W. Smith, I. M. Wright
Journal: Equine Veterinary Journal

Summary
Reasons for performing study

Fractures of the proximal phalanx are generally considered to result from monotonic supraphysiological loads, but radiological observations from clinical cases suggest there may be a stress-related aetiology.
Objectives

To determine whether there are radiologically identifiable prodromal changes in Thoroughbred racehorses with confirmed parasagittal fractures of the proximal phalanx.
Study design

Retrospective cross-sectional study.
Methods

Authors: M. R. W. Smith and I. M. Wright
Journal: Equine Veterinary Journal

Summary
Reasons for performing study

Although fractures of the proximal phalanx are one of the most common long bone fractures of Thoroughbred horses in training, limited details on variations in morphology and radiological progression have been published.
Objectives

To describe in detail the configuration of parasagittal fractures of the proximal phalanx in a group of Thoroughbred racehorses, to report fracture distribution within this group of horses and to document radiological progression of fracture healing in cases treated by internal fixation.
Study design

Category: Bone - Equine - Imaging - Radiography
Authors: E. B. Garcia, N. Rademacher, C. T. McCauley and L. Gaschen
Journal: Equine Veterinary Education

A 7-year-old Quarter Horse gelding was referred for magnetic resonance (MR) imaging due to chronic left hindlimb lameness localised to the foot. On presentation, a previously undiagnosed draining tract was identified at the plantar aspect of the pastern. Radiographs revealed severe osteolysis of the navicular bone. Positive contrast MR fistulography was performed using a gadolinium based contrast agent following conventional MR imaging of the left hind foot.

Category: Bone - Equine - Imaging - MRI
Authors: R. Labens, W.R. Redding, K.K. Desai, K. Vom Orde, R.A. Mansmann, A.T. Blikslager
Journal: The Veterinary Journal

Assessment of equine foot conformation is often based on linear and angular measurements performed on lateral digital photographs. However, quantification of external foot conformation requires more comprehensive assessments to capture the shape of the entire foot. Volumetric measurements of the hoof capsule represent a summary measure quantifying foot shape. The aim of this study was to develop a method for computation of virtual foot models from digital foot images allowing precise and accurate volumetric measurements.

Category: Equine - Imaging - Podiatry
Authors: N.C.R. te Moller, H. Brommer, J. Liukkonen, T. Virén, M. Timonen, P.H. Puhakka, J.S. Jurvelin, P.R. van Weeren, J. Töyräs
Journal: The Veterinary Journal

Arthroscopy enables direct inspection of the articular surface, but provides no information on deeper cartilage layers. Optical coherence tomography (OCT), based on measurement of reflection and backscattering of light, is a diagnostic technique used in cardiovascular surgery and ophthalmology. It provides cross-sectional images at resolutions comparable to that of low-power microscopy. The aim of this study was to determine if OCT is feasible for advanced clinical assessment of lesions in equine articular cartilage during diagnostic arthroscopy.

Authors: N.M. Werpy, J.M. Denoix, C.W. McIlwraith and D.D. Frisbie
Journal: Veterinary Radiology & Ultrasound

Previous studies have proposed that standard ultrasonography may not adequately represent the pertinent anatomic characteristics of the equine proximal suspensory ligament. The purpose of the study was to compare the use of standard ultrasonography, angle contrast ultrasonography, MRI, and histology for identification of the anatomic characteristics of the normal equine suspensory ligament in the forelimb. Horses free from forelimb lameness with no palpable abnormalities in the region of the suspensory ligament were included in the study.

Authors: C. Sherlock, A. Parks
Journal: Equine Veterinary Education

Radiographic studies are an essential component in evaluation of horses with laminitis. The standard radiographs that should be obtained to aid assessment of horses with laminitis are the lateromedial, horizontal dorsopalmar and dorsal 45° proximal palmarodistal oblique views. This article will summarise the assessment of these 3 projections in the laminitic horse as well as discuss the prognostic significance of common radiological abnormalities in horses with laminitis.

Authors: C. Gaedke, M. Witt, M. Koene, D. Berens von Rautenfeld and P. Stadler
Journal: Equine Veterinary Education

The horse frequently shows idiopathic primary lymphoedema or secondary lymphoedema following trauma or infection to its limbs. Lymphoedema develops if the balance between the amount of lymphatic fluid and capacity of lymphatic transport is disturbed. Scintigraphy appears to be the only in vivo technique to evaluate lymphatic transport capacity. The aim of this study was to develop an evaluation technique to determine the lymph flow in the hindlimb of the horse.