64层MSCT冠状动脉成像低剂量扫描的临床探讨  

Clinical Exploration of Low Dose Scanning on 64 Multi-slice Spiral CT Coronary Angiography

作　　者：刘红艳[1] 雷苑麟[1] 杨栋梁[1] 曾庆千 

机构地区：[1]广东省清远市人民医院影像中心,广东清远511500

出　　处：《临床医学工程》2012年第6期852-854,共3页Clinical Medicine & Engineering

摘　　要：目的探讨64层MSCT冠状动脉成像(CTcoronary angiography,CTCA)在固定噪声水平低剂量扫描中的临床应用。方法将连续行CTCA检查患者60例分为两组,回顾性分析30例作为固定mA组,随后采用前瞻性分析30例作为个体mA组,比较两组图像质量、噪声、CT剂量指数(CTDIvol)及有效剂量(effectivedose,ED)的差异。结果两组图像质量评分及噪声差异无统计学意义(P>0.05),个体mA组CTDIvol、ED分别为(99.29±9.04)mGy和(28.10±2.73)mSv,较固定mA组分别减少了10.64%、15.03%(P<0.01)。结论 64层MSCT冠脉成像在固定噪声水平个性化调节mA的方法,可有效地减少辐射剂量。Objective To explore the clinical application of low dose scanning on fixed noise level in 64-slice spiral CT coronary angiography （CTCA）. Methods Sixty patients with consecutive CTCA scan were divided into two groups. 30 cases as fixed-mA group were retrospectively analyzed, and 30 cases as individual-mA group were prospectively studied on CTCA scan. The image quality, noise, CT dose index volume （CTDIvol） and effective dose （ED） in the two groups were evaluated. Results The two groups had no significant difference in the image quality score and the mean image noise （P 0.05）. However, the average CTDIvol and ED in the individual mA group were （99.29 ± 9.04） mGy, （28.10 ± 2.73） mSv respectively, and lower than those in the fixed-mA group by 10.64%, 15.03% respectively （P 0.01）. Conclusion Radiation dose can efficiently reduce in the way of the individual adapted tube current selection on fixed noise level to the patients on 64-slice spiral CTCA.

关 键 词：冠状动脉 辐射剂量 体层摄影术 X线计算机 

分 类 号：R814.42[医药卫生—影像医学与核医学] R541.4[医药卫生—放射医学]