介入放射诊治中患者X射线辐射受照水平

目的 分析介入放射诊治中患者接受的X射线辐射,探讨减少辐射的方法。方法 采用Angiostar-Plus型DSA机随机配置的剂量测量系统(Diamentor K1),回顾性分析432例经血管途径介入诊治的面积剂量乘积(DAP,cGycm²)和入射剂量(ED,mGy)。结果 总体DAP值11900±10652,总体ED值679±589,摄影DAP均值为透视的3.34倍,摄影ED均值为透视的1.56倍。结论 透视时间长、摄影帧数多是DSA法介入诊治高剂量的两个主要的可控性因素,摄影剂量对总剂量的贡献大于透视,减低透视脉冲频率和减少摄影帧数可有效降低患者的X射线辐射。

Radiation Exposure to Patients in Interventional Radiology.

Objective To Analyze radiation exposure to patients in interventional radiology procedures and probe into the methods of reducing radiation.Methods Dose measurement system (Diamentor K1)equipped with DSA machine (Angiostar-Plus, Seimens, Gemany), analyzed dose-aera-production (cGycm²)and entering dose (mGy)of 432 patient having received interventional vascular radiology for diagnosis and treatment regressively.Results Dose value was (11 900±10 652)cGycm² and (679±589)mGy for overall, DAP and DE mean value in photography was 3.34、1.56 times of fluoroscopy respectively.Conclusion Longer time fluoroscopy and abundant photograph were primary controllable factors of high radiation dose using DSA for interventional radiology, there were more contribution of photograph than that of fluoroscopy in radiation dose.Reducing the fluoroscopy pulse frequency and decreasing the photo number can debase patients radiation exposure effectively.