PDF(Pubmed)
Abstract：
BACKGROUND: This study evaluates the change in an MRI of the proximal metacarpal region in a group of sport horses that returned to work. This retrospective analysis evaluated 18 limbs represented by 17 horses.
RESULTS: The hyperintense signal within the dorsal collagenous part of the proximal suspensory ligament (PSL) on T1W/T2*W GRE sequences decreased or stayed the same in the majority of cases. The hyperintense STIR signal within the dorsal collagenous part of the PSL resolved in the majority of the patients, and the third metacarpal bone (McIII) hyperintense STIR signal resolved in all patients. The dorsal margin irregularity of the PSL stayed the same, and McIII sclerosis and resorption of the palmar margin of McIII stayed the same in the majority of cases. McIII hyperintense STIR signal resolution carries a broad time range, with a mean of 94 days and a range of 47-202 days.
CONCLUSIONS: Complete normalization of the dorsal collagenous part of the PSL does not appear necessary for a return to soundness, but a resolution of the McIII hyperintense STIR signal is expected for horses returning to soundness. A rescan period of 120 days for the proximal metacarpal region is suggested. In addition, there was no significant change in the size of the PSL between the initial and final MRI.
RESULTS: The hyperintense signal within the dorsal collagenous part of the proximal suspensory ligament (PSL) on T1W/T2*W GRE sequences decreased or stayed the same in the majority of cases. The hyperintense STIR signal within the dorsal collagenous part of the PSL resolved in the majority of the patients, and the third metacarpal bone (McIII) hyperintense STIR signal resolved in all patients. The dorsal margin irregularity of the PSL stayed the same, and McIII sclerosis and resorption of the palmar margin of McIII stayed the same in the majority of cases. McIII hyperintense STIR signal resolution carries a broad time range, with a mean of 94 days and a range of 47-202 days.
CONCLUSIONS: Complete normalization of the dorsal collagenous part of the PSL does not appear necessary for a return to soundness, but a resolution of the McIII hyperintense STIR signal is expected for horses returning to soundness. A rescan period of 120 days for the proximal metacarpal region is suggested. In addition, there was no significant change in the size of the PSL between the initial and final MRI.
摘要：
背景：这项研究评估了一组重返工作岗位的运动马的近掌骨区MRI的变化。这项回顾性分析评估了由17匹马代表的18条肢体。
结果：在大多数情况下，T1W/T2*WGRE序列上，近端悬韧带（PSL）背侧胶原部分的高信号降低或保持不变。PSL背侧胶原部分的高强度STIR信号在大多数患者中得到解决，所有患者的第三掌骨（McIII）高强度STIR信号均消失。PSL的背缘不规则性保持不变，在大多数情况下，McIII硬化和McIII手掌边缘的吸收保持不变。McIII高强度STIR信号分辨率具有很宽的时间范围，平均94天，范围47-202天。
结论：PSL背侧胶原部分的完全正常化对于恢复健康似乎没有必要，但是，对于恢复健康的马匹，预计会有McIII高强度STIR信号的分辨率。建议对近端掌骨区域进行120天的重新扫描。此外,在初始MRI和最终MRI之间,PSL的大小没有显著变化.
结果：在大多数情况下，T1W/T2*WGRE序列上，近端悬韧带（PSL）背侧胶原部分的高信号降低或保持不变。PSL背侧胶原部分的高强度STIR信号在大多数患者中得到解决，所有患者的第三掌骨（McIII）高强度STIR信号均消失。PSL的背缘不规则性保持不变，在大多数情况下，McIII硬化和McIII手掌边缘的吸收保持不变。McIII高强度STIR信号分辨率具有很宽的时间范围，平均94天，范围47-202天。
结论：PSL背侧胶原部分的完全正常化对于恢复健康似乎没有必要，但是，对于恢复健康的马匹，预计会有McIII高强度STIR信号的分辨率。建议对近端掌骨区域进行120天的重新扫描。此外,在初始MRI和最终MRI之间,PSL的大小没有显著变化.
