双源CT大螺距前瞻性双次扫描模式在冠状动脉旁路移植术后随访中的应用

目的探讨双源CT大螺距前瞻性心电门控双次扫描模式(Double Flash)在冠脉旁路移植(CABG)术后随访中的应用价值。方法纳入2012年4月-2014年12月在解放军总医院采用冠状动脉CT成像(CCTA)检查的CABG术后患者61例,采用随机数字表法将患者分为A组(Double Flash扫描模式,30例)和B组(回顾性心电门控螺旋扫描模式,31例)。由两位高年资医师以双盲法采用4分法(1分为优秀,4分为不能诊断)评价图像质量,分别记录计算两种扫描模式患者的容积CT剂量指数(CTDIvol)和有效辐射剂量(ED)。结果两组冠状动脉移植血管共有139根。其中A组移植血管69根,包括动脉桥2...

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Published inJie fang jun yi xue za zhi Vol. 43; no. 1; pp. 65 - 68
Main Author 侯小玲;李丽君;何柏;郭凯;陈韵岱
Format Journal Article
LanguageChinese
Published Beijing People's Military Medical Press 2018
100853北京,解放军总医院心血管内科
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ISSN0577-7402
DOI10.11855/j.issn.0577-7402.2018.01.13

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Summary:目的探讨双源CT大螺距前瞻性心电门控双次扫描模式(Double Flash)在冠脉旁路移植(CABG)术后随访中的应用价值。方法纳入2012年4月-2014年12月在解放军总医院采用冠状动脉CT成像(CCTA)检查的CABG术后患者61例,采用随机数字表法将患者分为A组(Double Flash扫描模式,30例)和B组(回顾性心电门控螺旋扫描模式,31例)。由两位高年资医师以双盲法采用4分法(1分为优秀,4分为不能诊断)评价图像质量,分别记录计算两种扫描模式患者的容积CT剂量指数(CTDIvol)和有效辐射剂量(ED)。结果两组冠状动脉移植血管共有139根。其中A组移植血管69根,包括动脉桥25根,静脉桥44根;B组移植血管70根,包括动脉桥29根,静脉桥41根。A组的图像质量评分(1.22±0.57)与B组(1.21±0.61)比较差异无统计学意义(P〉0.05)。A组的ED和CTDIvol(分别为4.34±1.88m Sv和5.70±2.36m Gy)明显低于B组(分别为17.07±2.13m Sv和40.95±3.12m Gy),差异均有统计学意义(P〈0.001)。结论与普通回顾性心电门控螺旋扫描模式比较,双源CT Double Flash扫描模式可在保证图像质量的同时明显降低辐射剂量,可应用于CABG的术后随访。
Bibliography:dual-source computed tomography; coronary artery bypass graft; radiation dose; image quality
HOU Xiao-ling, LI Li-jun, HE Bai, GUO Kai, CHEN Yun-dai(Department of Cardiology, Chinese PLA General Hospital, Beijing 100853, China)
11-1056/R
Objective To evaluate the application of high-pitch dual-source CT with prospective ECG gated double scan mode(Double Flash) in postoperative follow-up of coronary artery bypass grafting(CABG). Methods Sixty-one patients undergone CABG and received coronary CT angiography(CCTA) from Apr. 2012 to Dec. 2014 were enrolled in present study. The patients were randomly divided into two groups according to scanning mode: group A(Double Flash mode, 30 cases) and group B(retrospective ECG gated spiral mode, 31 cases). Evaluation parameters included volumetric CT dose index(CTDIvol) and effective radiation dose(ED). All the coronary segments were evaluated with double blind method by two independent observers according to the image quality(IQ) on 4-point scale(1: excellent to 4: non-diagn
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ISSN:0577-7402
DOI:10.11855/j.issn.0577-7402.2018.01.13