全心运动校正算法在心肌桥-壁冠状动脉CT血管成像中的应用  

Application of Whole-Heart Motion-Correction Algorithm in Myocardial Bridge and Mural Coronary Artery CT Angiography

作　　者：张卓璐 孙建[1] 刘卓[1] 陈雷[1] 洪楠[1] ZHANG Zhuolu;SUN Jian;LIU Zhuo(Department of Radiology,Peking University People's Hospital,Beijing 100044,P.R.China)

机构地区：[1]北京大学人民医院放射科,100044

出　　处：《临床放射学杂志》2023年第5期845-849,共5页Journal of Clinical Radiology

摘　　要：目的评价第一代运动校正算法及第二代运动校正算法(全心运动校正算法)改善心肌桥-壁冠状动脉CT图像质量的效果。方法回顾性分析66例前降支心肌桥-壁冠状动脉CT图像。重建未经运动校正算法SSF(snapshot freeze)算法处理的图像,记为SSF0组;重建经第一代运动校正算法处理的图像,记为SSF1组;重建经第二代运动校正算法(全心运动校正算法)处理的图像,记为SSF2组。比较3组图像质量评分(0分:不能诊断;1分:合格;2分:优秀)。结果SSF2组图像主观评分(收缩期:1.9±0.3;舒张期:1.9±0.3)高于SSF1组(收缩期:1.4±0.8;舒张期:1.6±0.6);SSF1组图像主观评分高于SSF0组(收缩期:0.8±0.8;舒张期:1.1±0.8),差异有统计学意义(P<0.001)。SSF0组不可诊断图像(收缩期:26例;舒张期:15例)多于SSF1组(收缩期:12例;舒张期:4例),而SSF2组无不可诊断图像,差异有统计学意义(P<0.001)。结论与常规算法及第一代运动校正算法相比,全心运动校正算法可进一步抑制冠状动脉、心肌等结构的运动伪影,显著提升图像质量。Objective To evaluate the effect of a whole-heart motion-correction algorithm(second generation snapshot freeze,SSF2)on the image quality of coronary computed tomography angiography images in patients with myocardial bridge(MB)and mural coronary artery(MCA)compared to standard images without snapshot freeze(SSFO)and images with first generation snapshot freeze(SSF1).Methods 66 CCTA examinations with MB-MCA in left anterior descending artery were retrospectively analyzed.Images were reconstructed using standard algorithm without motion-correction algorithm,with first-generation motion-correction algorithm,and with second-generation motion-correction algorithm,respectively.The image quality of MB-MCA was assessed and compared(O:nondiagnostic,l:adequate and 2:excellent).Results The image quality scores in SSF2 group(systole:1.9±0.3;diastole:1.9±0.3)were significantly higher than those in SSFI group(systole:1.4±0.8;diastole:1.6±0.6),and scores in SSF1 group were significantly higher than SSF0(systole:0.8±0.8;diastole:1.1±0.8),all P<0.001.There were more non-diagnostic images in SSF0 group(systole:26,diastole:15)than SSF1(systole:12,diastole:4).No nondiagnostic image was found in SSF2 group,all P<0.001.Conclusion Whole-heart motion-correction algorithm can further reduce motion artifact and improve CT image quality in patients with MB-MCA,compared to standard images and images with first-generation motion-correction algorithm.

关 键 词：冠状血管 体层摄影 X线计算机 心肌桥 运动校正算法 

分 类 号：R816.2[医药卫生—放射医学] R541.4[医药卫生—临床医学]