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Use of high-field and low-field magnetic resonance imaging to describe the anatomy of the proximal portion of the tarsal region of nonlame horses.
Abstract: OBJECTIVE To use high-field and low-field MRI to describe the anatomy of the proximal portion of the tarsal region (proximal tarsal region) of nonlame horses. SAMPLE 25 cadaveric equine tarsi. PROCEDURES The proximal portion of 1 tarsus from each of 25 nonlame horses with no history of tarsal lameness underwent high-field (1.5-T) and low-field (0.27-T) MRI. Resulting images were used to subjectively describe the anatomy of that region and obtain measurements of the collateral ligaments of the tarsocrural joint. RESULTS Long and short components of the lateral and medial collateral ligaments of the tarsocrural joint were identified. Various bundles of the short collateral ligaments were difficult to delineate on low-field images. Ligaments typically had low signal intensity in all sequences; however, multiple areas of increased signal intensity were identified at specific locations in most tarsi. This signal intensity was attributed to focal magic angle effect associated with orientation of collagen fibers within the ligaments at those locations. Subchondral bone of the distal aspect of the tibia was uniform in thickness, whereas that of the medial trochlear ridge of the talus was generally thicker than that of the lateral trochlear ridge. In most tarsi, subchondral bone of the talocalcaneal joint decreased in thickness from proximal to distal. CONCLUSIONS AND CLINICAL RELEVANCE Results generated in this study can be used as a reference for interpretation of MRI images of the proximal tarsal region in horses.
Publication Date: 2018-02-22 PubMed ID: 29466044DOI: 10.2460/ajvr.79.3.299Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
Summary
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The study used high-field and low-field MRI to investigate the anatomy of the proximal tarsal region (near the ankle joint) of 25 healthy, non-lame horses. The purpose of the study is to create a reference that will help veterinarians better interpret MRI images of this area in horses.
Research Objective
- The primary objective of this study was to use both high-field and low-field magnetic resonance imaging (MRI) to comprehensively examine and document the anatomy of the proximal tarsal region (near the ankle) in horses. The researched aimed to provide a frame of reference which would help in the interpretation of MRI images of this area in horses.
Methods
- Twenty-five cadaveric (dead) horse limbs were used in the research. Each horse used in the study had no history of tarsal lameness.
- Both high-field (1.5-T) and low-field (0.27-T) MRIs were used to image the proximal tarsus of each horse.
- The resulting images were used to describe the anatomy and gain measurements of the collateral ligaments of the tarsocrural joint (a joint in the ankle).
Results
- Both long and short components of the lateral and medial collateral ligaments of the tarsocrural joint were successfully identified.
- Some parts of the shorter collateral ligaments were difficult to distinguish on low-field images.
- Generally, ligaments had a low signal intensity; however, certain areas showed increased signal intensity. This was attributed to the magic angle effect which is associated with the orientation of collagen fibres within the ligaments in specific locations.
- The thickness of the subchondral bone of the distal aspect of the tibia was uniform, while the medial trochlear ridge of the talus was generally thicker compared to the lateral trochlear ridge.
- Typically, the thickness of the subchondral bone of the talocalcaneal joint decreased from its proximal to distal aspects.
Conclusions
- The results provided in this study can serve as a reference guide for the interpretation of MRI scans of the proximal tarsal region in horses.
- Such a guide could be particularly useful in clinical settings, improving the accuracy of diagnosis and treatment planning for various tarsal conditions in horses.
Cite This Article
APA
Biggi M, Dyson SJ.
(2018).
Use of high-field and low-field magnetic resonance imaging to describe the anatomy of the proximal portion of the tarsal region of nonlame horses.
Am J Vet Res, 79(3), 299-310.
https://doi.org/10.2460/ajvr.79.3.299 Publication
Researcher Affiliations
MeSH Terms
- Animals
- Horses / anatomy & histology
- Ligaments, Articular
- Magnetic Resonance Imaging / methods
- Magnetic Resonance Imaging / veterinary
- Tarsus, Animal / anatomy & histology
- Tarsus, Animal / diagnostic imaging
Citations
This article has been cited 2 times.- Salem M, El-Shafaey ES, Farag AMM, El-Khodery S, Al Mohamad Z, Abass M. A Descriptive Study of the Carpal Joint of Healthy Donkeys Using Ultrasonography, Computed Tomography, and Magnetic Resonance Imaging. Vet Sci 2022 May 23;9(5).
- Nagy A, Dyson S. Magnetic Resonance Imaging, Computed Tomographic and Radiographic Findings in the Metacarpophalangeal Joints of 31 Warmblood Showjumpers in Full Work and Competing Regularly. Animals (Basel) 2024 May 9;14(10).
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