前门控大螺距扫描在双源CT冠状动脉成像中的应用  

Application of high-pitch spiral acquisition on dual-source CT coronary angiography

作　　者：王小强[1] 孙占国[1] 史志涛[1] 陈月芹[1] WANG Xiaoqiang SUN Zhanguo SHI Zhitao CHEN Yueqing(The Affiliated Hospital of Jining Medical University,Jining 2720292, Chin)

机构地区：[1]济宁医学院附属医院,济宁272029

出　　处：《济宁医学院学报》2017年第1期32-35,共4页Journal of Jining Medical University

基　　金：山东省高等学校科技计划项目(J14LL54);济宁医学院科研计划项目(JY2013KJ044)

摘　　要：目的评估128层双源CT(128s-DSCT)前门控大螺距扫描(Flash扫描)行冠状动脉CT成像(CCTA)的图像质量和辐射剂量。方法将符合纳入标准的100例拟行CCTA检查的可疑冠心病患者随机分为研究组(n=50,采用前门控Flash扫描)和对照组(n=50,采用前门控序列扫描),比较两组冠状动脉图像质量及有效辐射剂量。结果研究组整体图像质量低于对照组,差异有统计学意义(P<0.05);而研究组、对照组可用于诊断的血管段所占比例分别为98.72%、99.04%,差异无统计学意(P>0.05)。研究组和对照组平均辐射剂量分别为(1.06±0.22)m Sv、(3.08±0.88)m Sv,差异有统计学差异(P<0.05)。结论 128s-DSCT Flash扫描冠状动脉成像能在保证诊断需要的前提下明显降低辐射剂量。Objective To investigate the image quality,radiation dose of prospective ECG-gated high-pitch acquisition using 128-slice dual-source CT （ 128s-DSCT） coronary angiography. Methods According to inclu- sive criteria, 100 patients with suspected coronary artery disease（ CAD ） undergoing 128s-DSCT coronary an- giography were enrolled in this study and randomly divided into study group（50 cases,undergoing Flash ac- quisition） and control group （50 cases, undergoing sequential acqttisition）. The image quality （IQ） of coro- nary artery, and effective radiation dose were compared between the two groups. Results The IQ of study group was lower than that of control group（ P 〈 0.05 ）, while the proportion of coronary segments with diag- nosable IQ in study group and control group were 98.72% and 99.04% respectively, and no significant differ- ence was observed between the two groups （P 〉 0.05）. The effective radiation dose of study group （ 1.06 ± 0.22 ） mSv was lower than control group （ 3.08 ± 0.88 ） mSv, with significant difference （ P 〈 0.05）. Conclusion 128s-DSCT Flash model coronary angiography with diagnosable image quality is able to reduce radiation dose obviously.

关 键 词：体层摄影术 X线计算机 冠状动脉造影 大螺距 辐射剂量 

分 类 号：R543.3[医药卫生—心血管疾病]