Medical Radiology and Radiation Safety. 2014. Vol. 59. No. 4. P. 67-72
REVIEW
S.I. Ivanov1, S.V. Loginova1, N.A. Akopova1, S.E. Okhrimenko1, K.N. Nurlybaev2
Problems of Eye Lens Dosimetry
1. Russian Medical Academy of Postgraduate Education, Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ; 2. NPP “Doza”, Zelenograd, Moscow region, Russia.
ABSTRACT
In 2012, in its Basic Safety Standards for Radiation Protection, IAEA has lowered the annual dose limit for the eye lens from 150 mSv down to 20 mSv. The preceding ICRP Statement on lowering the dose limit was substantiated by results of studies of eye lens doses received by surgeons who use fluoroscopy during operations. In this paper we publish experimental data on doses to the eye lens of surgeons with and without shielding. Further, we analyze the problems that were evoked by the new dose limit and have to be addressed by radiation hygiene specialists, taking into account that up to date the operational quantity, namely the directional dose equivalent Н’(3, Ω), needed to determine the dose to the eye lens during occupational radiation monitoring, is not included in regulations in the Russian Federation.
CONTENT
Introduction
Effects of ionizing radiation on the eye lens
Rationale for a new dose limit for the eye lens
Monitoring of doses to the eye lens
Assessment of doses to the eye lens in the course of routine monitoring
Routine monitoring using personal dosimeters
Typical values of equivalent dose to the eye lens in interventional radiology
Conclusion
Key words: dose limit for the eye lens, weakly penetrating radiation types, directional dose equivalent Н’(3, Ω), interventional radiology