64排螺旋CT肺动脉与主动脉联合扫描技术

目的：探讨一次性完成肺动脉与主动脉 CT 造影检查技术。方法回顾性分析23例肺动脉与主动脉联合造影的患者CT 影像资料(A 组),另选肺动脉、主动脉 CT 造影正常的患者各13例为对照(B 组、C 组)。统计3组患者对比剂应用剂量和辐射剂量,观察异常血管显示情况,对比各组间正常肺动脉、主动脉 CT 值,以及4、5级肺动脉显示数量。结果A 组对比剂用量大于 B组和 C 组,但小于 B 组与 C 组之和；A 组辐射剂量与 C 组相当,明显少于 B 组与 C 组之和。23例中准确诊断6例肺动脉栓塞,1例肺动脉发育畸形；4例主动脉夹层,真假腔对比明显,5例主动脉炎,10例主动脉粥样硬化；结果正常者4、5级肺动脉显示数量、肺动脉与主动脉 CT 值和对照组对比均无统计学意义(P >0.05)。结论64排螺旋 CT 可一次性完成肺动脉与主动脉造影检查,对比剂用量和辐射剂量明显减少。

The scanning techniques of 64-slice spiral CT on pulmonary artery and aorta angiography at a time

Objective To investigate the CT angiography techniques of the pulmonary artery and aorta at a time.Methods Twenty-three patients who underwent the 64-slice spiral CT examinations of pulmonary and aortic angiography at a time were analyzed retrospec-tively (Group A).Also,13 cases whose pulmonary angiography showed normal (Group B)and 13 cases whose aortic angiography showed normal (Group C)enrolled in this study as control groups.The contrast media dose and the radiation dose were analyzed among three groups.The abnormal blood vessels were observed,and the CT values of the normal pulmonary artery and aorta and the number of the pulmonary 4,5 grade were compared among all groups.Results The contrast media dose in Group A was more than that in Group B or Group C,but less than the sum of that in Group B and Group C.The radiation dose in Group A was equivalent to that in Group C,which was obviously less than the sum of that in Group B and Group C.Six of 23 cases were accurately diagnosed as pul-monary embolism,1 case as pulmonary malformation,4 cases as aortic dissection whose true and false lumens clearly showed with contrast,5 cases as aortitis,and 10 cases as aortic atherosclerosis.For the cases whose angiography showed normal,there was no statistically significance of the number of the 4,5 grade of pulmonary artery and the CT values of pulmonary artery and the aorta compared with those of the control group (P >0.05 ).Conclusion The 64-slice spiral CT can be used to complete pulmonary and aortic angiography at a time,and the contrast media dose and the radiation dose can be reduced obviously.