手术室C形臂X射线机剂量率水平调查及个人防护建议

目的研究手术室C形臂X射线机的辐射剂量率水平分布及为保护工作人员所采用的防护措施。方法通过资料调查、现场实验测量的方式。结果受手术室空间布局及手术设施的影响,C形臂X射线机发射射线所致剂量率水平衰减按距离的2.278次方反比近似;防护屏风后、相邻手术室和外走廊射线衰减为本底水平;射线发生器水平、垂直照射影响手术室内剂量率水平空间分布,从而影响放射工作人员在手术室各位置接受的辐射剂量。结论手术过程中按规定进行操作和个人防护,能有效的降低工作人员所受的辐射风险,更好地保护个人职业健康。

Study of Radiation Dose Rate Distribution for Mobile C - Arm X - ray Machnie in Operating Room and Suggestions for Individual Protection.

Objective To study the dose rate distribution for radiation device in operating room and safety measures of Pro- tection for Radiation workers. Methods To be done through material investigation, experimental measurements, behavior ob- servation and analysis of radiation workers. Results The radiation dose rate for mobile C - Arm X - ray Machnie attenuates by inverse distance of factor 2. 278. Influenced by spatial layout, with the outside of protective screen area, the dose rate of the adjacent operating rooms and the corridors attenuates to background levels. The distribution of radiation dose rate in the operat- ing room is affected by the horizontal, vertical direction of ray generator, thus affect the dose of the radiation workers received working in the operating room at different position. Conclusion Proper operation procedure of radiation devices with specified personal protection can effectively reduce the risk of radiation during operation for individual occupational health.