64排螺旋CTA在下肢动脉闭塞及狭窄性病变中应用价值

目的：评价64排螺旋CT血管造影在下肢动脉闭塞性及狭窄性病变中应用价值。方法：采用美国GE公司生产LightSpeed VCT对52例患者进行下肢血管造影检查。扫描层厚0．625mm，管电压120KV、管电流130．205mAs，扫描时间约为10秒。图像后处理技术多采用VR、M1P、MPR、cMPR，图像分析密切结合原始轴位图像。结果：67支血管未见明确病变，CTA显示狭窄血管共77支，5支血管闭塞；狭窄≥50％，≤75％共21支；狭窄≤50％共51支。结论：64排CTA图像在发现闭塞远端血管方面优于DSA，可以清晰显示闭塞远端侧枝供血血管。随着64排螺旋CT临床广泛应用，在下肢血管疾病诊断方面的优势会得到长足发展。

Application of 64-row CT Angiography in Arterial Occlusive and Narrow Venereal Disease of Lower Extremity Arterial

Objective： To evaluate the potentialities of 64-row CT angiography in arterial Occlusive and narrow venereal disease of lower extremity. Methods： Use the American GE VCT LightSpeed to detect 52 patients of lower extremity arterials, slice thickness 0.625 mm, 120 KV, 130-205 mAs, scanning time for about 10 seconds. VR and M1P and cMPR and MPR were used in the post-processing technology. Image analysis was closely combined with the original axial images. Results： No obvious diseases were found in 67 vessels. CTA showed there were 77 narrow vessels, 5 vessels with occlusion, 21 vessels with stenosis among 50 % and75%, and 51 vessels with stenosis ≤ 50%. Conclusion： CTA image excels DSA in the discovery of distal vascular occlusion. With the wide application in clinic, 64-row CT will get full development in diagnosis of lower extremities vascular disease.