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
韦家旭 1施若洋 1蔡振杰 1顾雨伦 1王誉 2王嵇1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
dual-detector CT/coronary CT angiography/spectral CT/motion-correction reconstruction algorithm/high heart rate引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据