利用运动校正重建算法优化高心率患者冠状动脉CT血管成像质量  

Application of double-layer detector spectral CT motion correction reconstruction in patients with high heart rate

作　　者：韦家旭 施若洋 蔡振杰 顾雨伦 王誉 王嵇[1] WEI Jiaxu;SHI Ruoyang;CAI Zhenjie;GU Yuun;WANG Yu;WANG Ji(Department of Radiology,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200127,China;Philips Clinical and Technical Support,Shanghai 200027,China)

机构地区：[1]上海交通大学医学院附属仁济医院放射科,上海200127 [2]飞利浦临床与技术支持部,上海200072

出　　处：《分子影像学杂志》2024年第12期1298-1302,共5页Journal of Molecular Imaging

基　　金：国家自然科学基金(82302174)。

摘　　要：目的探讨双层探测器光谱CT运动校正重建算法(MCR)在高心率患者中的应用价值。方法回顾性纳入上海交通大学医学院附属仁济医院30例心率≥80次/min的患者资料,所有纳入标准的患者均完成冠状动脉CT血管造影,对比标准重建(STD)最佳期相及MCR图像,比较2组图像对比噪声比(CNR)、信噪比(SNR),采用5分法评估冠状动脉图像质量。结果两组间CNR、SNR差异有统计学意义(P<0.05);两组主动脉SD值、左冠状动脉前降支CT值、左冠状动脉回旋支CT值在STD和MCR之间的差异无统计学意义(P>0.05);但在右冠状动脉CT值上STD为346.46±60.17,MCR为363.54±54.40(P<0.05)。在图像噪声、冠状动脉节段的主观评分上STD和MCR间的差异有统计学意义(P<0.05)。结论MCR算法可在不增加额外扫描的情况下有效减少运动伪影,提高图像质量并增加冠状动脉CT血管造影检查的成功率。Objective To explore the application value of double-layer detector spectral CT motion correction reconstruction algorithm(MCR)in patients with high heart rate.Methods 30 patients with heart rate≥80 b/min in Renji Hospital,Shanghai Jiao Tong University were retrospectively included,all patients with the inclusion criteria completed coronary artery CT angiography,compared the standard reconstruction(STD)optimal phase and MCR images,compared the CNR and SNR of the two groups,and evaluated the quality of coronary artery images using a 5-point method.Results There was a statistically significant difference between the two groups in CNR and SNR(P<0.05).the SD value of the aorta,CT value of the left anterior descending coronary artery,and CT value of the left circumflex coronary artery between STD and MCR were not statistically significant(P>0.05);but the CT value of the right coronary artery was 346.46±60.17 in STD and 363.54±54.40 in MCR(P<0.05).There was a statistically significant difference between STD and MCR in image noise and subjective scoring of coronary artery segments(P<0.05).Conclusion MCR algorithm can effectively reduce motion artifacts without additional scanning,improve image quality,and increase the success rate of coronary artery CT angiography.

关 键 词：双层探测器 冠状动脉CT血管成像 光谱CT 运动校正重建算法 高心率 

分 类 号：R816.2[医药卫生—放射医学]