CT理论与应用研究2017，Vol.26Issue(6)：729-736,8.DOI:10.15953/j.1004-4140.2017.26.06.09
迭代重建在学龄前儿童胸部CT低剂量 平扫中的应用研究
Application of Iterative Reconstruction in Low-dose Chest CT Scans of Preschool Children
摘要
Abstract
Objective: To explore the feasibility of iDose4 iterative reconstruction technique in low-dose chest CT scans of preschool children. Methods: One hundred and fifty patients underwent non-contrast chest CT examinations, they were randomly assigned into three groups: control group(standard dose protocol 120 kV, 50 mAs) (n = 50); 25 mAs group (low dose protocol 120 kV, 25 mAs) (n = 50); and 10 mAs group (low dose protocol 120 kV, 10 mAs) (n = 50). Images from control group were reconstructed by FBP, and low-dose groups were reconstructed by FBP and iDose4. Subjective image quality was assessed by two associate chief physicians of radiology department in a blinded manner. Image quality and radiation dose of the 3 groups were compared and analyzed statistically. Results: Subjective and objective image quality in 25 mAs group with iDose4 compared with FBP was increased. Subjective and objective image quality in 10 mAs group with iDose4 compared with FBP was increased either. Subjective and objective image quality in 25 mAs with iDose4 was increased compared with control group. Subjective and objective image quality has no significant statistical difference between 10 mAs with iDose4 and control group. Effective dose in low dose groups 50 mAs and 25 mAs was decreased by 52.6%and 78.2% respectively. Conclusions: 50 and 25 mAs groups with iDose4 technique (iDose4-5) could obtain acceptable image quality in low-dose chest CT scans of preschool children while decreasing radiation dose.关键词
儿童/肺/体层摄影术/X线计算机/辐射剂量Key words
child/lung/tomography/X-ray computed/radiation dose分类
医药卫生引用本文复制引用
熊山,徐雷,程建敏,陈博,郑利,戴婷婷,刘四斌,黄原义..迭代重建在学龄前儿童胸部CT低剂量 平扫中的应用研究[J].CT理论与应用研究,2017,26(6):729-736,8.基金项目
荆州市医疗卫生科技计划项目(2016108) （2016108）
卫生部国家临床重点专科开放课题(20130204). （20130204）
