16层螺旋CT血管造影对下肢动脉闭塞性疾病的诊断及其临床价值

The evaluation of 16-slice spiral CT angiography in lower extremity arterial occlusive disease

目的探讨16层螺旋CT血管造影对下肢动脉狭窄及闭塞性病变的临床应用价值。方法对20例下肢动脉闭塞性疾病患者行16层螺旋CT血管造影(CTA),CTA重建采用最大密度投影(MIP)、容积再现技术(VR)、多平面重组(MPR)及曲面重建(CPR)。将下肢血管分成8段,每段血管的狭窄程度分为:正常、轻度狭窄、中度狭窄、重度狭窄、闭塞5个级别。结果 20例患者共显示狭窄段72个,其中髂总动脉狭窄5段,髂外动脉狭窄8段,股动脉狭窄10段,动脉狭窄22段,胫前动脉狭窄11段,胫后动脉狭窄12段,腓动脉狭窄4段。结论 16层螺旋CT是下肢动脉狭窄及闭塞性病变的可靠评估方法。

Objective To discuss the diagnostic value of 16-slice spiral CT angiography in assessment of lower extremity arterial occlusive disease. Methods Twenty patients with symptomatic lower extremity peripheral arterial occlusive disease underwent 16-slice spiral CT angiography. CT angiograms were produced using maximum intensity projection（MIP）, volume rendering（VR） technique, multiplanar reformation（MPR）, and curve planar reformation（CPR）. The arterial system was divided into 8 segments. Each segment was classified as normal, mild stenosis, moderate stenosis, severe stenosis and occlusion. Results In 20 patients, a total number of 72 stenosis and occlusion segments were observed . Among the 72 segments,the common iliac artery was found in 5 segments, the external iliac artery was in 8 segments, the femoral artery was in 10 segments, the anterior tibial artery was in 11 segments, the posteior tibial artery was in 12 segments, the peroneal artery was in 4 segments. Conclusion 16-slice spiral CT angiography is a reliable method for the lower extremity arteries disease.