Proposals for the type tests criteria and calibration conditions of passive eye lens dosemeters to be used in interventional cardiology and radiology workplaces

The paper is aimed at making a proposal for the type test and calibration of eye lens passive dosemeters especially used in the interventional cardiology/radiology (IC/IR). Starting from the only existing standard dealing with eye lens dosimetry using TLDs (ISO 12794), parameters such as, detection threshold, energy and angle dependence of response criteria have been reviewed and it has been tried to harmonise them as much as possible with the IEC 62387 requirements, taking into account the particular use at IC/IR workplaces. Conversion coefficients from air kerma to dose equivalent at 3 mm depth for RQR and ISO radiation qualities, employed for type test and calibration purposes, have been calculated in a new phantom introduced within the ORAMED (Optimization of RAdiation protection for MEDical staff) project. This phantom is more representative of the head so that the estimation of Hlens by Hp(3) is more accurate.

► At present only ISO 12794 deals with eye lens dosimetry in radiation protection.
► Some requirements must be updated accounting for interventional cardiology/radiology.
► Angle and energy responses and dose equivalent threshold might be more restrictive.
► ISO 4037 radiation qualities should be used for energy response in type test.
► IEC 61267 radiation qualities could be used for calibration purposes.