Dose measurements to the lens in nuclear medicine and in fluoroscopy-guided interventional procedures: analysis of the results and assessment of the effectiveness of protective eye-wear anti-X

The new limit of 20 mSv to the lens raises the need for further assessment of the equivalent dose to the lens for nuclear medicine and interventional radiology operators. (a) A measurement campaign was performed in nuclear medicine, (b) a routine monitoring was organised in interventional procedures and (c) the effectiveness of protective eye-wear was assessed. In nuclear medicine, for photon fields, the adequacy of H_p(0.07) of dosemeter worn on the trunk is confirmed; with ⁹⁰Y, the annual values of H_p(3) measured in therapeutic session are <5 mSv. In interventional procedures, routine monitoring of the dose to the lens must be maintained where the values of Hp(0.07) dosemeter worn on the trunk are higher than one-third of the new limits. The measures carried out have shown that the attenuation factor mean of the protective glasses is equal to ∼4 (range 1.7-11.4). (authors)