对比剂方案对能谱CT肺动脉成像图像质量的影响  

A study on the influence of contrast agent protocol on gem spectrum CT pulmonary angiography quality

作　　者：李信友[1] 魏淼[1] 胡志华[1] 张志伟[1] 吕发金[1] 

机构地区：[1]重庆医科大学附属第一医院放射科,重庆400016

出　　处：《重庆医学》2017年第15期2080-2082,共3页Chongqing medicine

基　　金：国家临床重点专科建设项目(国卫办医函[2013]544号)

摘　　要：目的比较能谱CT大剂量对比剂智能追踪肺动脉CT血管成像(CTPA)与小剂量对比剂团注测试肺动脉成像的图像质量。方法将106例疑似肺栓塞患者分A、B两组行能谱CT扫描,A组(54例)为肺动脉大剂量对比剂智能追踪成像,B组(52例)为小剂量对比剂团注测试肺动脉成像,比较两组图像质量差异。结果两组右肺动脉降支、右肺动脉后底支的CT值及肺下叶碘含量的比较差异均有统计学意义(P<0.01);两组图像评分比较差异有统计学意义(P<0.05)。A组图像质量优良率高于B组,比较差异有统计学意义(P<0.05)。结论能谱CT大剂量对比剂智能追踪肺动脉成像伪影少,血管强化均匀清晰,较小剂量对比剂团注测试肺动脉成像的图像质量更好。Objective To compare the image quality between large dose smart tracking technique and low dose test bolus technique for gem spectral CT pulmonary angiography（CTPA）.Methods A total of 106 cases with suspected pulmonary embolism were divided into two groups.Group A（54cases）was carried out with large dose smart tracking technique.Group B（52cases）was carried out with low dose test bolus technique.We compared the image quality between the two groups.Results There were significant differences in the CT value of the right pulmonary artery and the content of iodine in the lower lobe of the right pulmonary artery of two groups（P〈0.01）.There was significant difference of image quality between the two groups（P〈0.05）.The rate of excellent or good image quality in group A was higher than that in group B,and the difference was statistically significant（P〈0.05）.Conclusion Large dose smart tracking technique can track the artifacts of pulmonary artery imaging with less artifacts and uniform vascular fixation.The image quality of pulmonary artery imaging is better than that of small dose contrast agent.

关 键 词：肺动脉成像 对比剂剂量 图像质量 能谱CT 

分 类 号：R563.5[医药卫生—呼吸系统] R816.2[医药卫生—内科学]