Evaluation and protection of radiation exposure during neuron-interventional procedures

使用非常小的光致发光玻璃剂量计（pld），我们评估了患者和手术人员在神经介入放射学（NIVR）过程中的入口皮肤剂量（ESD）。同时，我们也尝试在NIVR过程中制作一个x射线防护装置的原型。本研究对象为32例患者，其中男性11例，女性22例，年龄中位数：61.5岁，年龄范围：15-76岁。同时测量操作人员的ESD。作为血管造影参数，在NIVR过程中记录x射线管电压、总曝光时间、总透视时间、数字减影血管造影（DSA）研究和帧数以及剂量面积积（DAP）。结果：x射线管电压总平均值为77.4 kV±8.6（标准差）；后前平面，79.1 kV±8.6；侧向，74.0 kV±7.4。患者右侧颞区最大总平均静电放电为1004 mGy±1295。因此，我们开发了一种易于测量头颈部静电放电的帽型仪器，并申请了专利。此外，我们还开发了NIVR过程中x射线保护装置的原型，并申请了另一项专利。在NIVR手术中监测患者ESD及其分布有助于减少辐射暴露，防止患者发生辐射损伤。

Using very small photoluminescence glass dosimeters (PLDs), we have evaluated entrance skin dose (ESD) during neuron-interventional radiology (NIVR) procedures in both patients and operators. Also we tried to make a prototype of x-ray protection device during NIVR procedures.Subjects in this research are 32 patients (11 male and 22 female ; median age:61.5 years ; age range:15-76 years). ESD on Operators have bean measured simultaneously. As angiographic parameters, x-ray tube voltage, total exposure time, total fluoroscopic time, the number of digital subtraction angiography (DSA) studies and frames and dose-area product (DAP) were recorded during NIVR procedure.As a result, total mean of x-ray tube voltage was 77.4 kV±8.6 (standard deviation) ; posterior-anterior plane, 79.1 kV±8.6;lateral plane,74.0 kV±7.4. Patient's maximal total mean ESD was 1004 mGy±1295 per procedure at right temporal area. Thus, we developed a cap-type ware to measure ESD of the head and neck easily, and made a patent application. In addition, we have developed a prototype of x-ray protection device during NIVR procedures, and made another patent application.Monitoring patient's ESD and its distribution by our procedure is useful to reduce radiation exposure and prevent patients from radiation injury in NIVR procedures.