目的 评价骶髂关节扫描技术在 早期强直性脊柱炎疾病中的应用价值。方 法 对120例疑为骶髂关节炎患者采用斜横 断面、斜冠状面薄层扫描进行综合分析。 结果 共发现双侧骶髂关节炎70例，单侧 骶髂关节炎45例，5例骶髂关节未见明显 改变。其中70例双侧骶髂关节炎病例中， 50例双侧骶髂关节间隙不同程度变窄，关 节面毛糙模糊，关节软骨水肿明显，呈不 规则中断、增粗，关节面下骨质内见片状 异常信号影，部分炎症累及髂骨，15例双 侧骶髂关节的软骨下局部骨硬化，软骨下 骨板边界不清，5例双侧骶髂关节炎病例 累及双侧坐骨、双侧髋臼，关节软骨面明 显模糊，骨髓水肿；45例单侧骶髂关节炎 中：40例单侧骶髂关节的间隙呈线样高信 号，患侧关节面毛糙、关节面下骨质见异 常高信号影，5例单侧骶髂关节炎合并累 及髂内、外肌伴脓肿形成。结论 骶髂关 节斜横断面、斜冠状面的扫描技术对早期 强直性脊柱炎的诊断有重要意义，值得临 床推广。

Objective To evaluate the value of sacroiliac joint scanning in the treatment of early ankylosing spondylitis. Methods A total of 120 patients with suspected sacroiliitis were analyzed using oblique transverse and oblique coronal thin-layer scans. Results A total of 70 cases of bilateral sacroiliac arthritis, 45 cases of unilateral sacroiliac arthritis and 5 cases of sacroiliac joint showed no significant changes. Among 70 cases of bilateral sacroiliac arthritis, 50 cases of bilateral sacroiliac joint space narrowed in varying degrees, articular surface rough and blurred, articular cartilage edema obvious, irregular interruption, thickening, flaky abnormal signal shadow in subarticular bone, part of the inflammation involved iliac bone. There were 15 cases of bilateral sacroiliac joint subchondral bone sclerosis, subchondral bone plate boundary unclear, 5 cases of bilateral sacroiliac arthritis involving bilateral ischia, bilateral acetabulum, articular cartilage surface obvious blurred, bone marrow edema. Among 45 cases of unilateral sacroiliac arthritis, 40 cases showed linear hyperintensity in the space between unilateral sacroiliac joints, abnormal hyperintensity in the rough articular surface and subarticular bone of the affected side, and 5 cases of unilateral sacroiliac arthritis complicated with involvement of internal and external iliac muscles with abscess formation. Conclusion The scanning technique of oblique cross-section and oblique coronal plane has important significance for the diagnosis of early ankylosing spondylitis and is worthy of clinical promotion.