80 kVp管电压冠状动脉CTA联合ASiR-V图像重建用于超重和Ⅰ级肥胖患者的可行性  

Feasibility of 80 kVp tube voltage coronary CTA combined with volume-based adaptive statistical iterative reconstruction in overweight or classⅠobesity patients

作　　者：杜静波[1] 任阿红[1] 李振武[1] 郭小会 杨涛[1] DU Jingbo;REN Ahong;LI Zhenwu;GUO Xiaohui;YANG Tao(Department of Radiology, People's Hospital of Beijing Daxing District,Beijing 102600, China)

机构地区：[1]北京市大兴区人民医院放射科,北京102600

出　　处：《中国介入影像与治疗学》2020年第5期289-293,共5页Chinese Journal of Interventional Imaging and Therapy

基　　金：北京市大兴区科技发展计划项目(KT201902314-01)。

摘　　要：目的探讨80 kVp管电压冠状动脉CTA(CCTA)联合体积自适应统计迭代重建-V(ASiR-V)图像重建应用于超重和Ⅰ级肥胖患者的可行性。方法将120例接受CCTA检查的超重和Ⅰ级肥胖患者随机分为80 kVp组和100 kVp组,每组60例,分别于80、100 kVp管电压下行CCTA,并采用权重为60%的ASiR-V进行图像重建。对比2组图像质量,各部位CT值、SNR、对比噪声比(CNR)、容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)、对比剂剂量及有效辐射剂量。结果80 kVp组和100 kVp组图像质量评分差异无统计学意义(P>0.05)。2组CTDIvol、DLP、对比剂剂量、有效辐射剂量差异均有统计学意义(P均<0.05);2组主动脉根部、右冠状动脉、左前降支及左回旋支CT值差异无统计学意义,右冠状动脉、左前降支及左回旋支SNR、CNR差异无统计学意义(P均>0.05)。结论80 kVp管电压CCTA联合60%ASiR-V图像重建应用于超重和Ⅰ级肥胖患者,可获得与100 kVp管电压相当的图像质量,且对比剂剂量及有效辐射剂量均减少。Objective To explore the feasibility of using 80 kVp tube voltage coronary CTA(CCTA)combined with volume-based adaptive statistical iterative reconstruction(ASiR-V)in overweight or classⅠobesity patients.Methods Totally 120 overweight or classⅠobesity patients who underwent CCTA were randomly divided into 80 kVp group or 100 kVp group(each n=60),and 60%ASiR-V was used for image reconstructions.The image quality,CT value,SNR,contrast noise ratio(CNR),CT dose index volume(CTDIvol),dose length product(DLP),contrast agent dose and effective radiation dose were compared between the two groups.Results There was no significant difference of image quality score between 2 groups(P>0.05).There were statistical differences of CTDIvol,DLP,contrast agent dose and effective radiation dose between 2 groups(all P<0.05).There was no significant difference of CT values in aortic root,right coronary artery,left anterior descending branch nor left circumflex branch between 2 groups(all P>0.05).No significant difference of SNR nor CNR of right coronary artery,left anterior descending branch and left circumflex branch was found between 2 groups(all P>0.05).Conclusion Adopting 80 kVp tube voltage combined with 60%ASiR-V image reconstruction for CCTA in overweight or classⅠobesity patients can obtain equivalent image quality to 100 kVp tube voltage,while the contrast agent dose and effective radiation dose are reduced.

关 键 词：超重 造影剂 冠状动脉疾病 体层摄影术 X线计算机 

分 类 号：R723.14[医药卫生—儿科] R814.42[医药卫生—临床医学]