目的探讨磁敏感加权成像 (Susceptibility-Weighted Imaging， SWI)在四肢软组织海绵状血管瘤的诊断价 值。方法 回顾性分析50例临床及病理证 实的四肢软组织海绵状血管瘤患者的影像 资料，对比SWI序列与常规扫描序列(包括 快速自旋回波序列TSE T1WI及T2WI；液体 衰减反转恢复序列T2 FLAIR；脂肪抑制SE T2WI)的影像诊断。结果 50例共检出62个 病灶，8例为多发。SWI结合常规序列共显 示Ⅰ(结节)型9个病灶，Ⅱ(局限团块)型 17个，Ⅲ(弥漫蔓藤)型25个和Ⅳ(混合)型 11个。其中24个病灶为低回流型病灶；38 个为高回流型。结论 SWI序列作为常规 MRI序列的重要补充序列，可以更全面、 准确的反映四肢软组织海绵状血管瘤内部 构成成分，显示畸形血管，鉴别钙化和出 血及铁沉积等，对于临床诊断、制定相关 治疗方案及评估预后有着重要的应用价 值。

Objective To evaluate the diagnostic value of susceptibility weighted imaging in cavernous hemangioma of extremities soft tissue. Methods Both 50 cases clinical and pathological were confirmed to be Cavernous hemangioma in extremities soft tissue scaned with SWI and Conventional MRI sequences. Results Total of 62 lesions of cavernous hemangioma in extremities soft tissue were detected from the 50 patients, including 8 patients with multiple lesions. Found Ⅰ(node) type 9 patients,Ⅱ(limited mass) type 17, Ⅲ(diffuse vines) type 25 and Ⅳ(hybrid) type 11. 24 lesions are Low return type and 38 lesions are high return type be shown. Conclusion SWI is an important supplement sequence of MRI in the diagnosis of hemangioma in extremities soft tissue, can reflect internal composition and physiological change of the lesions more fully, shows more obviously advantages on the analysis of the abnormal blood vessels，identification of calcification, hemorrhage and iron deposit，and owns important application value for clinical diagnosis, making relevant treatment and estimating prognosis