骶髂关节磁共振成像对强直性脊柱炎诊断的价值

The clinical value of MRI findings of sacroiliac joint for ankylosing spondylitis

目的探讨MR骶髂关节成像对强直性脊柱炎临床诊断的价值。方法回顾性分析60例2011年1月至2013年6月我院诊断AS病例的临床和影像资料。结果 (1)骶髂关节软骨改变:双侧49例,单侧7例共105个骶髂关节的关节软骨异常,表现为T1WI软骨信号增粗、中断、消失,呈混杂信号,T2WI软骨信号增高,表面不规则呈锯齿状;(2)骶髂关节骨质改变:双侧51例、单侧4例关节旁骨质骨髓水肿,16例脂肪沉积,双侧40例、单侧4例骨性关节面侵蚀、破坏及增生硬化。(3)骶髂关节间隙改变:23例关节间隙假性增宽,21例骶髂关节间隙不同程度狭窄;4例骶髂关节间隙消失、骨性强直;12例骶髂关节间隙正常。结论 MR骶髂关节检查有助于AS早期诊断及分期。

Objective To investigate the diagnostic value of MRI findings of sacroiliac joint for ankylosing spondylitis. Meth- ods A retrospective analysis was made on the chnical manifestations and imaging data in 60 cases of our hospital diagnosed AS between January 2011 and June 2013. Results （1） Enlargement,interrupt, cartilage disappeared were showed on T1WI and higher signal,irregular distortions, sawtooth shaped surface were showed on T2WI in 105 sacroiliac joint cartilages of patients with AS,49 cases on both sides,7 cases on one sides. （2） The MRI findings of sacroiliac joint＇s bone showed bone marrow edema（55cases）,fat sedimentation（16cases）,and articular surface erosion,damage and hardening（44cases）. （3） The sacroiliac joint space changes were pseudo broadening（23cases）,irregular narrow（21cases）,bony rigidity（4cases） and normal（12cases）. Conclusion With the features of MRI of sacroitiac joint,it may be helpful in the early diagnosis and clinical stage of AS.