IAEA Tec Doc-1731 ‘Implications for Occupational Radiation Protection of the New Dose Limit for the Lens of the Eye’

Abstract

IAEA SAFETY STANDARDS Under the terms of Article III of its Statute, the IAEA is authorized to establish or adopt standards of safety for protection of health and minimization of danger to life and property, and to provide for the application of these standards. The publications by means of which the IAEA establishes standards are issued in the IAEA Safety Standards Series. This series covers nuclear safety, radiation safety, transport safety and waste safety. The publication categories in the series are Safety Fundamentals, Safety Requirements and Safety Guides. Information on the IAEAs safety standards programme is available at the IAEA Internet site http://www-ns.iaea.org/standards/ The site provides the texts in English of published and draft safety standards. The texts of safety standards issued in Arabic, Chinese, French, Russian and Spanish, the IAEA Safety Glossary and a status report for safety standards under development are also available. For further information, please contact the IAEA at

Evaluation of 3D Printed Anthropomorphic Head Phantom for Calibration of TLD in Eye Lens Dosimeter

“…According to the IAEA Tec Doc-1731 [ 5 ], five medical sectors are exposed to high radiation doses, especially in the eyes area, for workers, who work close to the patient in radiological intervention procedures, such as in fluoroscopy and nuclear medicine staff for preparing sources or radiopharmaceuticals radiation and equipment, such as Positron Emission Tomography (PET)/Computed Tomography (CT); in addition, the workers involved in manual brachytherapy, CT guided interventional procedures, including biopsy and cyclotron staff are investigated [ 5 ]. The best estimate for the dose exposed to the eye lens can be measured using a dosimeter calibration at H p (3) above the standard phantom as an imitation of a human head [ 6 , 7 ].…”

Development of methodologies for estimating the dose to the eye lens in interventional radiology : operational implications of the eye lens new dose limit

“…ICRP 118 considered the threshold in absorbed dose for the lens of the eye to be 0.5 Gy based on these observations and it recommended reducing the equivalent dose limit for the lens of the eye for workers from 150 mSv per year to 20 mSv per year, averaged over a period of 5 years, with no single year exceeding 50 mSv (ICRP, 2012). This drastic change in dose limit was incorporated into the revised European and International Basic Safety Standards (EURATOM, 2014;IAEA, 2013). The Directive 2013/59 EURATOM is to be implemented in national legislation of member states in 2018.…”

“…The IAEA TecDoc No. 1731 'Implications for occupational radiation protection of the new dose limit for the lens of the eye' provides advice to ensure appropriate individual monitoring of the eye lens (IAEA, 2013). Likewise, in 2015, the International Standard, ISO-15382, 'Radiological protection Procedures for monitoring the dose to the lens of the eye, the skin and the extremities', provides guidance on how and when monitoring of the eye lens should be done, for all the different types of workplace fields (ISO, 2015).…”

“…In the case of the eye lens this is when the eye lens equivalent dose is greater than 15 mSv. In most technical reports (IAEA, 2013;IRPA, 2017), given the uncertainty associated with the eye lens dose assessment, eye lens dose monitoring is recommended above 6 mSv per year. The use of lead glasses, even though it substantially reduces H p (3), 14.6.…”

“…They are also in good agreement with the phantom results in Table14.1. Based on the general agreement between different MC and phantom studies, as well as with some of the clinical measurements,(Martin, 2011) and(IAEA, 2013), recommend adopting a correction factor of 0.75 in practice for H p (0.07) measured at neck.…”