256排宽体CT结合CMC3.0冠脉运动补偿技术对不同心率患者CCTA图像质量的影响  

A study on the effect of 256-row wide-body detector CT combined with CMC3.0 coronary motion compensation technique on the image quality of CCTA in patients with different heart rate

作　　者：韩晓雯 闻天航 王冠 周暄凯 施嘉航 朴成浩[1] HAN Xiao-wen;WEN Tian-hang;WANG Guan(Department of Radiology,the Second Affiliated Hospital of Shenyang Medical College,Shenyang 110035,China)

机构地区：[1]沈阳医学院附属第二医院,辽宁沈阳110035 [2]东软医疗系统股份有限公司CT产品事业部,辽宁沈阳110035

出　　处：《放射学实践》2024年第12期1598-1604,共7页Radiologic Practice

基　　金：辽宁省教育厅科研平台项目(LJ232410164023);沈阳市卫生健康委员会科研项目资金资助(202311)。

摘　　要：目的:探讨256排宽体探测器CT结合CMC3.0冠脉运动补偿技术对不同心率患者冠脉CTA图像质量的影响及应用价值。方法:回顾性搜集2023年7月1日-8月28日在本院行冠状动脉CTA扫描的100例患者的临床和影像资料。使用自动选择最佳期相技术,在常规标准算法基础上应用CMC3.0冠脉运动补偿技术对图像进行后处理。将所有患者按心率(HR)分为A组(HR<70 bpm)和B组(HR≥70 bpm),并进一步根据是否应用CMC技术分为非CMC组(A1组、B1组)和CMC组(A2组、B2组)。对各组的图像质量及辐射剂量等指标进行分析和比较。结果:A2组的左前降支(LAD)、左旋支(LCX)及右冠脉主干(RCA)的图像质量主观评分分别为4.660±0.479、4.750±0.434和4.610±0.493,均高于A1组(分别为4.230±0.643、4.360±0.606和3.790±0.661),差异均有统计学意义(P<0.001);B2组的LAD、LCX及RCA的主观评分分别为4.540±0.555、4.440±0.502和4.380±0.493,均显著高于B1组(3.790±0.656、3.970±0.584、3.490±0.601,P<0.001)。A、B组运用CMC技术前后图像质量主观评分差值(即改善情况),分别为LAD:0.430±0.499、0.740±0.549;LCX:0.390±0.525、0.460±0.600;RCA:0.820±0.671、0.900±0.598,高心率组3支冠脉应用CMC技术前、后的评分差值均大于低心率组,其中以LAD的评分差值更大(P=0.006)。B组应用CMC技术前、后SNR分别为12.47±4.10、12.64±4.02;差异有统计学意义(P<0.043)。A、B组CMC后处理时间及辐射剂量(CTDI vol、DLP、ED)的差异均无统计学意义(P>0.05)。结论:CMC3.0冠脉运动补偿技术在不增加辐射剂量的情况下,对改善不同心率患者CCTA图像质量具有可行性和较高的临床应用价值,可以有效提升高心率患者的CCTA图像质量,保证精准诊断。Objective:The purpose of this study was to explore the impact and application value of 256 row wide-body detector CT combined with CMC3.0(Cardiac Motion Correction3.0)coronary motion compensation technology on the image quality of coronary CTA in patients with different heart rates.Methods:The clinical and imaging data of 100 patients who underwent coronary CTA scan in our hospital from July 1 to August 28,2023,were retrospectively collected.Based on the conventional standard algorithm,the CMC3.0 coronary motion compensation technology was applied using the automatic optimal phase-selection technique.All patients were divided into group A[with heart rate(HR)70bpm]and group B(with HR≥70bpm),and further subdivided into non-CMC technology groups(group A1 and group B1)and CMC technology groups(group A2 and group B2)according to the application of CMC technology.Then,the image quality,radiation dose,and other indicators of each group were analyzed and compared.Results:In group A2,the subjective image quality scores of the left anterior descending artery(LAD),left circumflex artery(LCX),and right coronary artery main trunk(RCA)were 4.660±0.479,4.750±0.434,and 4.610±0.493,respectively,all significantly higher than those in group A1(4.230±0.643,4.360±0.606,and 3.790±0.661,respectively),and the differences were statistically significant(P<0.001).In group B2,the subjective scores of LAD,LCX and RCA were 4.540±0.555,4.440±0.502,and 4.380±0.493 respectively,which were significantly higher than those in group B1(3.790±0.656,3.970±0.584,and 3.490±0.601 respectively,P<0.001).The diffe-rences in subjective image quality scores(i.e.,improvement)before and after using CMC technology in groups A and B were as follows:for LAD,0.430±0.499 in group A and 0.740±0.549 in group B;for LCX,0.390±0.525 in group A and 0.460±0.600 in group B;for RCA,0.820±0.671 in group A and 0.900±0.598 in group B.The score differences of the three coronary arteries in the high-heart-rate group before and after applying CMC technology wer

关 键 词：冠状动脉 CT血管成像 冠脉运动补偿算法 运动伪影 图像质量 

分 类 号：R814.42[医药卫生—影像医学与核医学] R543.3[医药卫生—放射医学]