冠状血管造影术患者辐射剂量及相关影响因素的分析

Analysis on radiation dose and relative factors in patients undergoing coronary angiograph

目的评价冠状血管造影术(CAG)患者的辐射剂量及其影响因素。方法对190例接受CAG检查的患者进行回顾性分析,使用剂量转换因数计算患者的有效剂量(ED),并分析患者体质量指数(BMI)、穿刺入路、透视时间、采集帧数及血管病变与患者ED的相关性。结果患者的平均累计剂量(DOSE)为400.54mGy,平均总剂量面积乘积(DAP)为28.26Gy.cm2,平均ED为5.23mSv。透视时间、BMI及采集帧数的回归系数分别为0.757、0.442、0.012,差异有统计学意义(P<0.05)。结论肥胖、透视时间长和高采集帧数为CAG检查中的辐射剂量增加重要因素,熟练的术者及采用降低采集帧数的新技术,可有效降低辐射剂量。

Objective To evaluate the radiation dose and the relative factors in the patients with coronary angiography（CAG）.Methods 190 patients undergoing CAG were analyzed retrospectively.The effective dose（ED） of patients was calculated by using effective dose conversion factor.The correlation of ED with the body mass index（BMI）,puncture approach,fluoroscopy time,number of frames and vessel lesion was analyzed.Results The average accumulated dose of the patients was 400.54 mGy,the average total dose-area product（DAP） was 28.26 Gy·cm2,the average ED was 5.23 mSv.The regression coefficient of fluoroscopy time,BMI and number of frames was 0.757,0.442,0.012,respectively,the difference showing statistical significance（P0.05）.Conclusion Obesity,longer fluoroscopy time and more number of frames are the important factors for higher radiation dose in CAG,the radiation dose can be reduced by highly skilled operators and adopting the new technology lowering the number of frames.