陕西医学杂志2018，Vol.47Issue(6)：712-716,5.DOI:10.3969/j.issn.1000-7377.2018.06.009
256层螺旋CT低辐射剂量扫描联合迭代重建技术诊断肺动脉栓塞临床价值研究
Clinical value of 256-slice spiral CT low radiation dose scanning combined with iterative reconstruction in the diagnosis of pulmonary embolism
摘要
Abstract
Objective :Aim to evaluate the usage of low-dose CT scanning and iterative reconstruction in the accurate diagnosis of pulmonary embolism while decreasing the radiation dose and image quality not compromised . Methods :108 patients finally diagnosed as pulmonary embolism were reviewed and divided into three groups A ,B , and C .Patients in Group A were scanned under routine radiation dose (120kV ) and images were reconstructed by filtered back projection (FBP) ,while Group B radiation dose (100kV) ,FBP and Group C radiation dose (100kv) , iterative reconstruction (iDose) .the CT dose index volume (CTDI vol) ,dose length product (DLP) ,effective radia-tion dose (ED) ,The mean value of main pulmonary artery and dorsal muscles ,signal/noise ratio (SNR) ,contrast noise ratio (CNR) of the images in each group were recorded and compared .The image quality were graded and scored 1-5 ,according to these parameters .Results :Under subjective evaluation ,the image quality in three groups has no significant difference .Under objective evaluation ,group A ,B and B ,C has statistical difference (P< 0 .05) while no statistical difference (P> 0 .05)between group A ,C .Group B has the privilege of lower dose BUT louder noise and decreased SNR ,CNR ,compared with Group A .The image quality in Group C (iDose) surpassed that in group B (FBP) (P < 0 .01) .The effective dose (ED) of group B ,C was decreased by 18 .0％ ～ 19 .6％ compared with ED of group A .Conclusion :For patients diagnosed as pulmonary embolism ,low dose scan and iterative reco nstruction in CTPA (CT Pulmonary Angiography) can decrease the radiation dose effectively and provide accepted image quality ,which can be applied broadly in clinical work and research .关键词
肺栓塞/诊断/体层摄影术,X线计算机/辐射剂量Key words
Pulmonary embolism /Diagnosis/Tomogyaphy,X-ray computed/Radiation dosage分类
医药卫生引用本文复制引用
董燕,杨勇,杨军乐,宁文德,董季平,刘润,张军俭,宁文锋..256层螺旋CT低辐射剂量扫描联合迭代重建技术诊断肺动脉栓塞临床价值研究[J].陕西医学杂志,2018,47(6):712-716,5.基金项目
陕西省科技厅社会发展攻关计划项目(2014K12-10) （2014K12-10）
