320排宽体CT中自适应运动校正算法在高心率患者的应用研究  

Application of adaptive motion correction algorithm on 320-row-wide-detector CT in patients with high heart rate

作　　者：周明盛 潘德锋 徐敏 王龙胜[1] ZHOU Mingsheng;PAN Defeng;XU Min;WANG Longsheng(Department of Radiology,the Second Hospital of Anhui Medical University,Hefei 230601,China;Department of Radiology,Baoying County Hospital of Traditional Chinese Medicine,Yangzhou,Jiangsu Province 225000,China;Canon Medical Systems(China)Co.,Ltd.,Beijing 100015,China)

机构地区：[1]安徽医科大学第二附属医院放射科,安徽合肥230601 [2]宝应县中医医院放射科,江苏扬州225000 [3]佳能医疗系统(中国)有限公司,北京100015

出　　处：《实用放射学杂志》2023年第3期400-403,共4页Journal of Practical Radiology

摘　　要：目的探讨320排宽体CT中自适应运动校正(AMC)算法在高心率患者中的应用价值。方法纳入51例心率>75次/min的患者资料,所有患者进行冠状动脉CT血管成像(CCTA)检查;分别自动重建2组图像:Best Phase最佳期相和AMC图像,比较2组图像的对比噪声比(CNR)、信噪比(SNR),采用5分法评估冠状动脉图像质量(5分,优秀;1分,不能诊断)。结果51例患者153支主干血管纳入分析,Best Phase重建图像诊断3~5分的节段为141支(92.16%),平均评分(4.06±0.83)分,AMC重建图像诊断3~5分的节段为152支(99.35%),平均评分(4.38±0.66)分,2组患者的主观评分差异有统计学意义(P<0.05)。客观评价中2组图像SNR、CNR的差异无统计学意义(P>0.05)。结论320排宽体CT在高心率患者CCTA检查中,应用AMC自动重建图像,可以不增加额外曝光、有效降低运动伪影,同时减少放射科医生手动重建时间,满足图像质量要求。Objective To investigate the application value of adaptive motion correction(AMC)algorithm on 320-row wide-detector CT in patients with high heart rate.Methods A total of 51 patients underwent coronary CT angiography(CCTA)with heart rate higher than 75 beats per minute were included.Best Phase and AMC images were automatically reconstructed.Contrast-to-noise ratio(CNR)and signal-to-noise ratio(SNR)were compared.Coronary image quality was graded with five-point scale(5 for excellent and 1 for poor).Results A total of 51 patients with 153 main vessels were included in the analysis.In the Best Phase images,141 segments(92.16%)could be diagnosed score 3-5,with an average score of(4.06±0.83).In the AMC images,152 segments(99.35%)could be diagnosed score 3-5,with an average score of(4.38±0.66).The difference in subjective scores between the two groups was statistically significant(P<0.05).There was no significant difference in objective scores of SNR and CNR between the two groups(P>0.05).Conclusion For patients with high heart rate underwent 320-row-wide-detector CT scan,AMC can effectively reduce motion artifacts without additional exposure and the time of manual reconstruction by radiologists,therefore,the image quality requirements can be obtained.

关 键 词：320排宽体CT 冠状动脉CT血管成像 Best Phase 自适应运动校正 高心率 

分 类 号：R814.42[医药卫生—影像医学与核医学] R814.43[医药卫生—放射医学] R541[医药卫生—临床医学]