平扫CT与HRCT诊断强直性脊柱炎骶髂关节病变的对照研究  

Comparative Study of Plain CT and High Resolution CT in Diagnosis of Sarcroiliitis in Ankylosing Spondylitis

作　　者：王芳[1] 王青[1] 

机构地区：[1]山东大学齐鲁医院影像中心,山东济南250012

出　　处：《实用放射学杂志》2007年第3期362-364,共3页Journal of Practical Radiology

摘　　要：目的 比较平扫CT和HRCT在强直性脊柱炎（AS）骶髂关节病变分级中的作用。方法 对82例AS患者骶髂关节的平扫CT及HRCT表现进行分析。平扫CT检查使用GE Hispeed型螺旋机，层厚5mm，间隔5mm。HRCT采用高分辨骨算法重建，层厚1．25mm，间隔5mm。依据纽约放射标准对病变分级，作平行对照研究，并进行统计学分析。结果 对照研究表明，9个关节平扫CT可疑的病变，HRCT可以肯定诊断；22个关节平扫CT表现为早期病变（0～Ⅱ级）的患者HRCT对其分级更为准确；Ⅲ、Ⅳ级病变平扫CT和HRCT分级相仿（P〉0．05）。结论 HRCT对于AS骶髂关节早期病变的诊断优于平扫CT，而对于中度及重度关节炎的改变同平扫CT，诊断价值相同。Objective To compare the value of plain CT and HRCT in diagnosing sacroiliitis of ankylosing spondylitis （ AS）. Methods The sacroiliac images of plain CT and HRCT of 82 patients with AS were retrospectively analysed. GE Hispeed spiral CT was used. The slice thickness and space were both 5 mm. High Resolution restruction of bone algorithm was done with the thickness of 1.25 mm and the space of 5 mm. The appearances presented by the two methods were compared and graded . The relationship between them was analyzed with statistics. Results HRCT could certainly prove the diagnosis of sacroiliitis in 9 suspected by plain CT image . HRCT was more accurate in grading AS of grade 0 to Ⅱ than plain CT in 22 joints. While concerning grade Ⅲ and Ⅳ , HRCT and plain CT was similar, namely （ P 〉 0.05 ）. Conclusion HRCT is surperior to plain CT in grading,especially in the evaluating early lesions of sacroiliac joint,but for the moderate and serious inflammatory changes of AS, both CT and HRCT are equivalent in the diagnosis of sacroiliitis.

关 键 词：骶髂关节炎 强直性脊柱炎 体层摄影术 X线计算机 

分 类 号：R814.42[医药卫生—影像医学与核医学] R684.3[医药卫生—放射医学]