强直性脊柱炎骶髂关节病变的X线与CT对照分析

目的：旨在评估强直性脊柱炎（ＡＳ）患者骶髂关节病变的ＣＴ表现，并比较Ｘ线和ＣＴ在强直性脊柱炎骶髂关节病变中的作用。材料和方法：对２１例ＡＳ患者骶髂关节Ｘ线平片及ＣＴ表现进行回顾性分析。Ｘ线检查包括骶髂关节正位片，ＣＴ检查使用ＧＥ—Ｈ９８００Ｑｕｉｃｋ型ＣＴ机及ＧＥ—ＨｉｓｐｅｅｄＣＴ／ｉ型螺旋机，层厚５ｍｍ，间隔５ｍｍ。结果：２１例中全部４２个关节受累，主要病变包括：①关节面下囊性变。②关节面硬化。③关节面侵蚀。④关节间隙变窄或增宽。⑤关节强直。结论：ＣＴ对于强直性脊柱炎骶髂关节病变的检出率高于Ｘ线平片，尤其是对于ＡＳ骶髂关节早期病变及较小的病变的诊断优于Ｘ线平片，而对于中度及重度关节炎的改变同Ｘ线诊断价值相同。

Comparision of radiography and computed tomogaphy imaging in the detection of sacroiliitis with angkylosing spodylitis

Objective:To evaluate features of sacroiliitis with ankylosing spodylitis on CT imaging and to compare the CT imagings with findings obtaited by conventional rodiography with ankylosing spodylitis(AS).Material and methods:Twenty one AS patients were analysed.each patient underwent CT and canventional rediography scanning and his(her) CT imagings of vertebra column,Sacroiliac were compared with those by radiography.Sacroiliitis was observed in all 21 AS patients.An anteroposterior radiography of the pevis was performed on each patient.GE-9800 quick CT and Hispeed CT/i equipments were used in CT imaging.Slice thickness and space was 5mm.Results:All 42 joints in 21 AS patients were involved.Predominant abnormalities included:(1)cystic change under the articular surface;(2)sclerosis of the articular surface;(3)erosions of the articular surface;(4)joint space narrowing and widening;(5)joint ankylosis.Conclusion:CT and radiography are both helpful to the diagnosis of AS.CT is surperior to plain radiograph .AS far as the middle and serous inflammatory changes of joint,diagnostic value of the two is equivalent.