北华大学学报（自然科学版）2017，Vol.18Issue(1)：82-86,5.DOI:10.11713/j.issn.1009-4822.2017.01.019
双源CT低管电压联合迭代重建算法在冠状动脉成像中的应用研究
Study of Dual-source CT Coronary Angiography Using Combination of Low Tube Voltage and Iterative Reconstruction
摘要
Abstract
Objective To explore the value of combination low tube voltage of 80 kV and iterative reconstruction technique in cardiac computed tomography angiography. Method Sixty patients with prospectively ECG-triggered high-pitch spiral computed tomography coronary angiography with heart rate less than 65 beats/min and body mass index (BMI) lower than 25 kg/m2. 60 cases were randomly divided into group A(120 kV),group B(80 kV). Group B was divided into group B1 ( filtered back projection, FBP ) and group B2 ( Signogram affirmed iterative reconstruction,SAFIRE) according to raw data reconstruction method. Image quality of each group was evaluate subjectively. Evaluate and compare the difference in the image noise,mean CT values(SI),signal-to-noise ratio ( SNR) ,contrast-to-noise ratio( CNR) and effective dose( ED) . Results There was no significant difference in the image quality scores between group A and group B2(P>0. 05). The noise of group B2 was significantly higher than group A(P<0. 01). There was no significant difference between SNR and CNR(P>0. 05). The noise of group B2 was significantly lower than group B1(P<0. 01). The SNR and CNR of group B2 was significantly higher than group B1(P<0. 01). The mean effective dose in group A and group B was 7. 30±0.68 mSv and 0. 79±0. 10 mSv respectively. The effective dose of group B was significantly smaller than group A. The effective dose was decreased by 89%. There was significant difference between them(P<0. 05). Conclusion Compared with FBP,SAFIRE can significantly improve the image quality of the coronary artery with the same tube voltage;For the patient with BMI lower than 25 kg/m2 ,using combination of low tube voltage and iterative reconstruction can significantly reduce the radiation dose without affecting the image diagnosis.关键词
冠状血管/辐射剂量/体层摄影术/X线计算机Key words
Coronary vessels/Radiation dose/Tomography/x-ray computed分类
医药卫生引用本文复制引用
姜倩男..双源CT低管电压联合迭代重建算法在冠状动脉成像中的应用研究[J].北华大学学报（自然科学版）,2017,18(1):82-86,5.基金项目
吉林市科技发展计划项目(201339011) （201339011）
