The value of multi-slice spiral CT in lower extremity arterial occlusive diseases

Objective To evaluate the diagnostic value of multi-slice spiral CT in assessing the lower extremity arterial occlusive diseases.Methods Sixty-three patients with suspected peripheral arterial occlusive diseases underwent multi-slice spiral CT angiography(CTA) of lower extremity arteries,the helical scans cover renal artery to the artery of the lower extremity.HP xw8000 workstation was used for 3D reconstruction.Digital subtraction angiography(DSA) was used as the standard reference,the diagnostic accuracy of CTA was determined.Results Of the 1 323 segments,1 305 were assessable on both DSA and CTA.On DSA images,390stenoocclusive segments(48 mild stenosis,36 moderate stenosis,66 severe stenosis,and 240 occlusion) were detected.On CTA images,393 stenoocclusive segments(51 mild stenosis,30 moderate stenosis,72severe stenosis,and 240 occlusion) were detected.With regard to segments that had more than moderate stenosis,the sensitivity,specificity and accuracy of maximum intensity projection(MIP) were 99.1%,99.7% and 99.5%.Conclusion multi-slice spiral CT has sensitive,specific and accuracy in detecting lower extremity arterial occlusive diseases and may partially substitute DSA.