Exposure of eye lens as a possible limiting factor?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21460%2F17%3A00314865" target="_blank" >RIV/68407700:21460/17:00314865 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00259-017-3822-1" target="_blank" >http://dx.doi.org/10.1007/s00259-017-3822-1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00259-017-3822-1" target="_blank" >10.1007/s00259-017-3822-1</a>

Result language

angličtina

Original language name

Exposure of eye lens as a possible limiting factor?

Original language description

Eye lens measurement was performed at selected PET departments. Workers wore specially modified glasses with TLDs for monitoring Hp(3). TLDs were placed at positions corresponding to 3 well-known eye lens exposure monitoring configurations. 5 MCP-7 dosimeters were placed above the right and left eye lenses, on the outside corners of the eyes, and between the eyes at the root of the nose, where a MCP-Ns dosimeter was also placed to control the presence of positrons in the radiation field. Workers wore glasses only during the preparation and administration of radiopharmaceuticals labelled with 18F and 11C. The eye lens exposure is routinely controlled based on monitoring Hp(10), Hp(3) and Hp(0.07) on the chest, so besides the glasses with TLDs, each monitored person was also equipped with an additional personal dosimeter, worn only with the above mentioned glasses. During the monitoring of workers video shots of individual activities were taken. It has been performed experimental as well as MC simulations of risk procedures where the exposure of the eye lens may be higher than the exposure of the monitors placed on the chest. Based on present measured data (workplace experiments are still going on), it can be seen that exposure of the right and left eye lenses is similar. In contrast to local hand exposure, exposure of the eye lens appears to be lower during the same manipulations involving 18F application. This will be verified for radiopharmaceuticals labelled with 11C emitting more energetic positrons than 18F. Based on the MC simulation it was found that during the manipulation with unshielded radionuclide 11C the eye lens may be exposed with positrons. 3 systems of monitoring eye lens were experimentally compared. Place the dosimeter on the root of the nose appears as the most practical system. Experimental measurements continue at department with radiopharmaceutical labelled with 11C, where it is necessary to verify the irradiation of eyes lens of the positrons

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30305 - Occupational health

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů