多层螺旋CT血管造影对髂静脉受压综合征的诊断

Multislice Spiral CT Angiography on the Diagnosis of Iliac Vein Compression Syndrome

目的探讨多层螺旋CT血管造影(MSCTA)对髂静脉受压综合征(IVCS)的诊断价值.方法 19例临床疑似IVCS的患者行MSCTA检查,由左足背静脉注射对比剂80 mL,注射速率1 mL/s,延迟50 ～ 70 s扫描,准直20 mm,螺距1.375,总扫描时间约35 s,重建层厚2.5 mm,间隔1.25 mm,用容积再现(VR)和曲面重建(CPR)进行图像重建.结果 MSCTA诊断IVCS 18例,1例未见异常.该19例患者后经数字减影血管造影(DSA)检查(n=16)和手术(n=3)证实,MSCTA的诊断符合率为100%.结论 MSCTA对IVCS的诊断有较大价值,是对下肢顺行静脉造影很好的补充.

Objective To evaluate the multislice spiral CT angiography （MSCTA） in the diagnosis of iliac vein compression syndrome （IVCS）. Methods MSCTA was performed in 19 patients with clinical suspected IVCS. Contrast medium in volume of 80 mL was injected in 1 mL/s through the left dorsal pedal vein, and scanning was delayed 50--70 s, with collimation of 20 mm and pitch of 1. 375. The total scanning time was 35 s, with slice increments of 2.5 mm, and overlapping 50%. All images were reconstructed by means of volume rendering （VR） and curve multiplanar reformation （CPR）. Results IVCS was diagnosed by MSCTA in 18 patients, and no abnormality was found in 1 patient. Digital subtraction angiography （DSA） was performed in 16 patients, and 3 patients were operated on. Among these 19 cases, the results of MSCTA were completed in accord with those of DSA and surgery, and the diagnostic coincident rate was 100%. Conclusion MSCTA plays an important role in the diagnosis of IVCS. It is well complementary to the ascending venography in the lower extremity as well.