中国医疗设备2017，Vol.32Issue(12)：91-94,4.DOI:10.3969/j.issn.1674-1633.2017.12.022
自适应迭代重建在双低剂量CTU排泄期中的应用
Application of Adaptive Statistical Iterative Reconstruction in Theexcretion Phase of CT Urography with Double Low Dose Scan
徐亚运 1杨尚文 1杨军 2房海燕 3高敏3
作者信息
- 1. 南京大学医学院附属鼓楼医院 医学影像科,江苏 南京 210008
- 2. 南京中医药大学附属八一医院 影像科,江苏 南京 210000
- 3. 南京鼓楼医院仙林医院 医学影像科,江苏 南京 210000
- 折叠
摘要
Abstract
Objective To evaluate the feasibility of CT urography (CTU) scanned with double low-dose (low-dose contrast agent and low-dose radiation), which combined with adaptive statistical iterative reconstruction (ASIR). Methods A total of 60 patients underwent CTU were randomly divided into group A and B, with 30 cases in each group. Patients in group A received a conventional scan with 120 kV and filtered back projection (FBP) reconstruction. Patients in group B received a low-dose scan with 80 kV, with noise index of 15, and image reconstruction by ASIR. The image noise, contrast noise ratio (CNR), volume weighted CT dose index (CTDIvol) and effective dose (ED) were measured and calculated. Image quality was evaluated by 3 radiologists. Results The image quality score of group A and B were 4.56±0.45 and 3.78±0.56, respectively; CNR were 27.82±15.55 and 22.13±13.46, respectively. There were no significant difference between group A and B (P>0.05). CTDI of group B was much lower than that in group A, ED of group B was much lower than that of group A. The contrast medium volume of group B was lower than group A. There were significant difference between group A and B (P<0.05). Conclusion In CTU examination, scanning with double low-dose and combining ASIR can reduce the radiation dose and incidence of contrast medium adverse reaction with maintained image quality.关键词
泌尿系CTU/体层摄影术/X线计算机/低辐射剂量/自适应迭代重建Key words
CT urography/tomography/X-ray computed/low radiation dosage/adaptive statistical iterative reconstruction分类
医药卫生引用本文复制引用
徐亚运,杨尚文,杨军,房海燕,高敏..自适应迭代重建在双低剂量CTU排泄期中的应用[J].中国医疗设备,2017,32(12):91-94,4.
