IVRの被ばく線量管理

最近の動向

抄録

In 2011, the threshold dose for cataract was lowered from 8 Gy to 0.5 Gy, and the recommended occupational equivalent dose limit for the lens of the eye was also lowered from 150 mSv/year to 20 mSv/year. Even before amendment of the relevant domestic laws and regulations, it is better for us interventional radiologists to adapt ourselves to this change and to resolve the shortage of lead aprons/eyewears/shields as soon as possible. Second personal dosimeter outside the lead apron is necessary to avoid underestimation of the lens dose.
Diagnostic reference level (DRL) is a useful tool in interventional radiology as well for management of patient dose with regard to avoiding unnecessary radiation risks, though the complexity of the procedure must be taken into account. Dose survey of interventional procedures for the next revision of Japanese DRL is planned to be conducted in the near future.