早期强直性脊柱炎骶髂关节病变低场MRI诊断

摘要

目的 探讨低场MRI对早期强直性脊柱炎(AS)骶髂关节(SIJ)的诊断.方法 对46例AS的SIJ进行MRI横、斜冠状位扫描,包括快速自旋回波(FSE) T2WI,自旋回波(SE)T1WI,快速自旋回波(FSE- XL) T2WI+ 脂肪抑制,3D FW FGRE T2WI.男33例,女13例,年龄15～46岁,平均22.6岁.结果 46例早期AS骶髂关节MRI表现的患者中,Ⅰ级18例(34.8%),Ⅱ级28例(65.2%).骶髂关节单侧受累15例(32.6%),双侧同时受累31例(67.4%).早期MRI表现为骨髓水肿、关节软骨异常分别有38个、28个,骨质侵蚀20个,骨质硬化12个.结论 MRI有利于显示AS的SIJ早期表现,可为临床治疗提供客观依据.%Objective To study early diagnosis of sacroiliitis in ankylosing spondylitis( AS). Methods 46 patients with AS under-went MRI,T1 WI,FSE T2WI and T2WI plus fat FGRE T2WI at trans- and coronal section. There were 33 men and 13 women, the age ranged from 15 - 46 years old with mean of 22. 6 lyears old. Results Of 46 cases, the sacroiliitis in grade I in 18 cases (34. 8%) and grade II in 28 cases(65. 2%) was showed by MR imaging. There were unilateral involvement in 15 cases and bilateral involvement in 31 cases. The early MR imaging findings included bone marrow edema in 38 joints, abnormal articular cartilage in 28 joints, bone erosion in 20 joints and osteosclerosis 12 joints. Conclusion MR imaging examination in AS is beneficial for early diagnosis and clinical administration.