Gray Sarah N, Puchalski Sarah M, Galuppo Larry D
William R. Pritchard Veterinary Medical Teaching Hospital, University of California, Davis CA 95616, USA.
Vet Radiol Ultrasound. 2013 May-Jun;54(3):245-52. doi: 10.1111/vru.12033. Epub 2013 Mar 14.
Injuries of the intercarpal ligaments are an important cause of lameness in performance horses. The purpose of this prospective cadaver study was to determine whether computed tomography (CT) arthrography would be a feasible method for visualizing and characterizing intercarpal ligaments in the horse. One cadaver limb from each of eight nonlame horses was collected immediately after euthanasia. For each limb, overlapping 2.0 mm CT images were acquired before and after injection of iodinated contrast medium into the antebrachiocarpal joint, middle carpal joint, and carpal sheath. Spin echo magnetic resonance imaging (MRI) sequences were acquired in three planes using a 1.5 Tesla MRI scanner in three limbs. Following MRI, colored resin was injected into the synovial structures of these three limbs, limbs were frozen, and anatomic sections were obtained in three planes. Findings from CT arthrograms were compared to findings from precontrast CT, MRI, anatomic slices, and arthroscopy. Medial and lateral palmar intercarpal ligaments, radiocarpal and transverse intercarpal ligaments, and palmar carpal ligament were visible in CT arthrograms of all limbs. The proximal and distal entheses of all ligaments were readily identifiable. Findings indicated that CT arthrography is feasible for visualizing intercarpal ligaments and may be a useful adjunct imaging technique for diagnosing lameness due to suspected carpal ligament injury in horses.
腕骨间韧带损伤是竞技马匹跛行的一个重要原因。这项前瞻性尸体研究的目的是确定计算机断层扫描（CT）关节造影是否是一种可视化和描述马腕骨间韧带的可行方法。在八匹无跛行的马安乐死后，立即采集每匹马的一个尸体肢体。对于每个肢体，在向腕掌关节、腕中关节和腕腱鞘内注射碘化造影剂之前和之后，获取重叠的2.0毫米CT图像。使用1.5特斯拉MRI扫描仪在三个肢体的三个平面上采集自旋回波磁共振成像（MRI）序列。MRI检查后，向这三个肢体的滑膜结构中注入彩色树脂，将肢体冷冻，并在三个平面上获取解剖切片。将CT关节造影的结果与造影前CT、MRI、解剖切片和关节镜检查的结果进行比较。在所有肢体的CT关节造影中均可见掌侧腕骨间内侧和外侧韧带、桡腕韧带和腕骨间横韧带以及掌侧腕骨韧带。所有韧带的近端和远端附着点都很容易识别。研究结果表明，CT关节造影对于可视化腕骨间韧带是可行的，并且可能是诊断马匹疑似腕骨韧带损伤导致跛行的一种有用的辅助成像技术。
