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[目的]探讨强直性脊柱炎(AS)早期及活动期的MRI表现,以提高其诊断水平。[方法]回顾性分析AS患者的骶髂关节及脊柱26例MRI的表现特点。[结果]本组12例病人均有双侧骶髂关节滑膜软骨MRI信号改变,其中5例还有骨髓信号改变。13例病人23个骨突关节出现关节突骨髓及周围软组织水肿,其中3例行增强扫描。6例病人17个椎体可见椎缘炎。2例前纵韧带水肿。3例棘间韧带水肿。2例脊柱呈后弓驼背畸形,并可见伴脊肌萎缩。[结论]MRI检查可对未确诊早期AS的诊断能提供重要的影像信息;对已确诊AS的临床活动性期判断及病情分期评估有重要帮助。
[Objective] To investigate the MRI manifestations of early and active ankylosing spondylitis (AS) in order to improve its diagnostic level. [Methods] The MRI findings of sacroiliac joint and spinal column in AS patients were retrospectively analyzed. [Results] The MRI signals of synovial cartilage of bilateral sacroiliac joint were changed in 12 patients in this group, and the signal of bone marrow in 5 patients also changed. Thirteen patients with osteoarthritis of the facet joint bone marrow and surrounding soft tissue edema, including three cases of enhanced scanning. 17 vertebrae of 6 patients showed vertebral inflammation. 2 cases of anterior longitudinal ligament edema. 3 cases of interspinous ligament edema. 2 cases of posterior arch bow posterior deformity, and can be seen with spinal muscular atrophy. [Conclusion] The MRI examination can provide important imaging information for the diagnosis of AS without early diagnosis. It is of great help to judge the clinical active stage and stage of disease in the diagnosed AS.