两种数字化X线影像系统在冠状动脉造影中的辐射剂量对比研究

Comparison of radiation dose of two digital radiographic systems in coronary angiography procedures

目的:评价平板探测器(FPD)和基于电荷耦合器成像的影像增强器(II-CCD)在冠状动脉造影时对患者辐射剂量的影响。方法:采用FPD和II-CCD分别在拟人模体上进行冠状动脉造影操作,并采用射线剂量仪测量辐射剂量和剂量率,每台造影机测量3次,取算数平均值。结果:在透视模式下,FPD较II-CCD辐射剂量减少5.6%,在摄影模式下则增加7.8%,完成冠状动脉造影FPD较II-CCD总射线剂量增加2.3%。结论:在冠状动脉造影时采用FPD较II-CCD于透视模式下可减少对人体的辐射剂量,摄影模式下则增加辐射剂量,完成冠状动脉造影所需总射线剂量也稍增加。

Objective： To evaluate the impact of fiat-panel detector （FPD） and image intensifier charge-coupled device （II-CCD） on the radiation dose in coronary angiography procedures. Methods： FPD and II-CCD digital radiographic systems were used in coronary angiography procedures, and radiation dose and dose rate were measured using a phantom and radiation detector for three times with each digital radiographic system. Results： The radiation dose with FPD digital radiographic system decreased by 5.6% for fluoroscopy, but increased by 7.8% for digital cine angiography, and the total radiation dose with FPD digital radiographic system increased by 2.5% for completing coronary angiography procedures as compared to II-CCD digital radiographic system. Conclusion： Compared to II-CCD digital radiographic system, the radiation dose with FPD digital radiographic system decreases for fluoroscopy, but increases for digital cine angiography and the total radiation dose with FPD digital radiographic system increases for completing coronary angiography procedures.