医疗卫生装备2017，Vol.38Issue(2)：76-79,88,5.DOI:10.7687/J.ISSN1003-8868.2017.02.076
“双低”技术主动脉MSCTA临床应用研究
Application of double-low technique to aortic MSCTA
余红胜 1沈又利 1刘义康2
作者信息
- 1. 432000湖北孝感,孝感市康复医院放射科
- 2. 432000湖北孝感,华中科技大学同济医学院附属孝感医院放射科
- 折叠
摘要
Abstract
Objective To discuss the feasibility of double-low technique applied in aortic MSCTA.Methods Totally 70 patients with BMI not more than 25 kg/m2 were divided into a routine group and an experimental group randomly and equally,and then went through aortic MSCTA.Iohexol (350 mgI/ml) was injected with the velocity of 4 ml/s.The routine group had the parameters as 120 kV,120 mAs and 1.5 ml/kg contrast agent,and the experimental group had the parameters as 90 kV,120 mAs and 1.0 ml/kg contrast agent,while the other scanning parameters were kept the same in the two groups.The radiation doses,contrast agent doses and iodine contents were recorded in the two groups,and the image quality was assessed with double-blind method objectively and subjectively.Results The experimental group had the CT dose index volumes (CTDIvol),dose length product (DLP) and effect dose (ED) significantly lower than those in the routine group (P＜0.05).The two groups had the consistency of subjective scores (Kappa＞0.6) and image quality scores (not lower than 2) meet the desired requirements,and there were no significant differences between the scores (P＞0.05).Objective evaluation showed that the signal values of aortic trunk and major branch vessels as well as image noise SD of the experimental group were obviously higher than those in the routine group (P＜0.05).There were no statistical differences between the signal noise ratios (SNR) and contrast to noises (CNR) in the two groups (P＞0.05),The iodine content in the contrast agent of the experimental group was significantly lower than that in the routine group (P＜0.05).Conclusion Double-low technique applied in aortic MSCTA of the patient with BMI not more than 25 kg/m2 reduces the radiation dose and iodine content in the contrast agent,has the image quality meet the desired requirements,and thus is of great value for clinical application.关键词
管电压/对比剂/团注追踪/主动脉/辐射剂量/多层螺旋CTKey words
tube voltage/contrast agent/bolus tracking/aorta/radiation dose/multi-slice spiral CT分类
医药卫生引用本文复制引用
余红胜,沈又利,刘义康..“双低”技术主动脉MSCTA临床应用研究[J].医疗卫生装备,2017,38(2):76-79,88,5.
