踝关节韧带损伤MRI影像特征

目的探讨踝关节急、慢性损伤状态下踝关节韧带的MRI影像特征。方法对45例踝关节损伤患者行踝关节MR检查,评价踝关节韧带损伤的MRI特征表现,各韧带联合损伤特点,以及儿童踝关节韧带损伤特征。结果 45例患者中韧带损伤64条,急性损伤T2W及PD序列表现为受损韧带信号不均匀增高,韧带部分撕裂或完全断裂,界限不清,周围可见高信号积液影、软组织水肿及邻近骨髓水肿;慢性损伤主要表现为韧带的不规则增粗或变细,信号不均匀。外侧副韧带损伤37例(37/64,57.81%),以距腓前韧带损伤为主(24/45,53.33%)。8例(8/8,100%)患儿均为距腓前韧带损伤。结论踝关节韧带损伤MRI特征表现为T2WI不均匀增高伴韧带撕裂,以距腓前韧带损伤最为常见。

MRI features of ankle ligament injury

Objective To evaluate the MRI features of ankle ligament injury in acute and chronic injury of ankle.Methods The MRI data of 45 cases of ankle injury was retrospectively analyzed. MR examination were performed in all cases. The MRI features of ankle ligament injury were evaluated. The features of the combined injuries of ligaments and the characteristics of children's ankle ligament injury were analyzed.Results There were 64 ligaments injury in 45 cases. The increased signal in T2W and PD sequence was found in the acute injury ligament which was torn or completely broken with unclear limit, and the high signal surround the ligament, soft tissue edema and adjacent bone marrow edema were observed. The main manifestations of chronic injury were the irregular thickening or thinning of the ligaments, the signal was not uniform. The lateral collateral ligament injury was found in 37 cases (37/64, 57.81%), the injury was mainly in the anterior talofibular ligament (24/45, 53.33%). Ankle injuries in all 8 children cases (8/8, 100%) were occurred in the anterior talofibular ligament.Conclusion MRI features of ankle ligament injury mostly show disruption with inhomogeneous hyperintense signal on T2WI. The anterior talofibular ligament injury is the most common.