Value of 64-slice spiral CT angiography in diagnosing arterial diseases of the lower extremities

Objective:To assess the role of 64-slice spiral CT angiography for lower limb arterial diseases and its technique superiority.Methods:28 cases of diseases of lower limb arteries were studied,the helical scans cover renal artery to the artery of the lower extremity.We used Siemens Wizard workstation for 3D reconstruction.And we analyed images with MPR,MIP,VR.In 21 cases,the manifestations of MSCTA were compared with that of conventional angiography.Results:Of the 441 segments,435 were assessable on both DSA and CTA.On DSA images,130 stenoocclusive segments(16 mild stenosis,12 moderate stenosis,22 severe stenosis,and 80 occlusion) were detected.With regard to segments that had more than moderate stenosis,the sensitivity,specificity and accuracy of MIP were 99.1%?99.7%?99.5%.Conclusion:The assessment of angiography of diseases of lower limb arteries with 64-slice spiral CT is equal to DSA basically,it is a highly accurate and non-invasive angiography in diagnosing arterial diseases of the lower extremities.