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J Equine Sci. 2017;28(3):105-110. doi: 10.1294/jes.28.105. Epub 2017 Sep 20.

Characteristic findings of magnetic resonance imaging (MRI) and computed tomography (CT) for severe chronic laminitis in a Thoroughbred horse.

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Azabu University, Kanagawa 252-5201, Japan.
Obihiro University of Agriculture and Veterinary Medicine, Hokkaido 080-8555, Japan.
Hidaka Training and Research Center, Japan Racing Association, Hokkaido 057-0171, Japan.
Race Horse Hospital, Ritto Training Center, Japan Racing Association, Shiga 520-3085, Japan.
Tokyo University of Agriculture and Technology, Tokyo 183-8538, Japan.


A Thoroughbred horse with severe chronic laminitis of both forelimbs was evaluated on the same day with magnetic resonance imaging (MRI) and computed tomography (CT). Both MRI and CT revealed loss of the dorsal aspect of the cortical bone of the 3rd phalanx and sclerosis. CT reflected the status of the horny layer and bone of the affected feet, while MRI depicted inflammation of the laminar corium, together with tendon edema. On the 3-dimensional CT venogram, vessels were visualized in both the right and left forelimbs, although there was a difference in the vasculature of the coronary plexus and circumflex vessels between the right and left forelimbs. A combination of both MRI and CT provides detailed information regarding pathological conditions.


computed tomography (CT); laminitis; magnetic resonance imaging (MRI); venogram

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