管电流自动补偿在双源CT下肢CTA降低辐射剂量的价值  

Dual-source CT Using Tube Current Auto Compensatory Scan to Reduce Radiation dose of Lower Extremities CTA

作　　者：薛水培[1] 万素珍 沈比先[1] 姜梅[1] 汪春荣[1] 张大波[1] 保莲[1] 

机构地区：[1]广东医学院附属南山医院,广东深圳518052 [2]深圳市蛇口人民医院,广东深圳518026

出　　处：《中国CT和MRI杂志》2015年第6期111-114,共4页Chinese Journal of CT and MRI

摘　　要：目的探讨双源CT动态管电流调节技术补偿低电压扫描在下肢CTA降低辐射剂量的价值;方法回顾性的分析双源CT下肢CTA患者64例,根据不同的扫描条件分常规组和实验组各32例,应用统计学软件分析两组病例图像质量、CTDIvol、DLP、ED、SNR、CNR是否有统计学意义;结果两组病例图像质量、CTDIvol、DLP、ED、SNR、CNR常规组分别为:2.75±0.44、4.30±0.21、4 8 3.5 3±3 5.7 3、8.1 0±0.5 4、27.43±4.81、23.38±4.61;实验组分别为:2.72±0.46、2.15±0.11、2 3 7.0 9±1 3.8 8、3.5 6±0.2 1、28.34±4.96、24.14±4.76。两组图像评分、SNR、CNR均无统计学意义(P>0.05);CTDIvol、DLP、ED均有的统计学意义(P<0.01),实验组小于常规组约50%;结论双源CT动态管电流调节技术管电流补偿低电压扫描在下肢CTA中降低辐射剂量效果明显,是一个值得推广的方法。Objective To investigate the dual-source CT Lower Extremities CTA using tube current auto Compensatory Low voltage scan to reduce radiation dose.Methods A retrospective analysis of 64 cases of dual-source CT Lower Extremities CTA imaging data. According to the different points of the scanning conditions we divided routine group and experimental group 32 cases each. We applied statistical software to analysis two groups of cases the image quality,CTDIvol, DLP, ED, NR, CNR whether statistical significance. Results The routine group respectively：2.75±0.44、4.30±0.21、483.53±35.73、8.10±0.54、27.43±4.81、23.38±4.61;The experimental group respectively： 2.72±0.46、2.15±0.11、237.09±13.88、3.56±0.21、28.34±4.96、24.14±4.76; Two sets of image quality, SNR, CNR had no statistical significance （P〉0.05）; Differences between the two groups CTDIvol, DLP, ED values are statistically significant （P〈0.01）, the experimental group were decreased by approximately 50% compared to the routine group.Conclusion The Dual-source CT Lower Extremities CTA using tube current auto Compensatory Low voltage scan to reduce radiation dose effect is obvious.It is a good method worthy of popularizing.

关 键 词：双源CT 管电压 动态管电流调节 CT血管造影 辐射剂量. 

分 类 号：R543.5[医药卫生—心血管疾病] R445.3[医药卫生—内科学]