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＜70bpm)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:0.43 0±0.499、0.74 0±0.549;LCX:0.39 0±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(CT-DIvol、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.
Abstract
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 auto-matic 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 ap-plication 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 were all greater than those in the low-heart-rate group,and the score difference of LAD was even more significant(P=0.006).In group B,the signal to noise ratios(SNRs)before and after applying CMC technology were 12.47±4.10 and 12.64±4.02 re-spectively,with a statistically significant difference(P=0.043).There were no statistically significant differences in CMC reconstruction time and radiation dose(CTDIvol,DLP and ED)between group A and group B(all P＞0.05).Conclusion:The CMC3.0 coronary motion compensation technology is fea-sible and of high clinical application value in improving the CCTA image quality of patients with dif-ferent heart rates without increasing the radiation dose.It can effectively enhance the CCTA image quality of patients with high heart rates and ensure accurate diagnosis.
维普
万方数据