Evaluation of a 3D printed OSL eye lens dosimeter for photon dosimetry
- 29 May 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Radiological Protection
- Vol. 40 (4), 1247-1257
- https://doi.org/10.1088/1361-6498/ab97fe
Abstract
This work demonstrates the use of high-resolution 3D printing to fine-tune the low energy dependence of an eye lens dosimeter holder associated to a BeO OSL detector element (ezClip). Five geometries of the denominated iBe dosimeter were developed, three with a variation in the thickness of the wall in front of the sensitive element that tailor the response at low radiation energies; and three with variation of width and curvature in order to vary the angular response of the dosimeter badges. Additive manufacturing was accomplished using stereolithography which showed a high degree of accuracy and precision. The optimized dosimeter badges showed a low energy and angular dependence, within -20% to +20% in the energy range of 24 keV to 662 keV and from 0 to 60 incidence; and within -10% to +10% in the energy range of 24 keV to 164 keV and from 0 to 60 incidence. In contrast to other dosimeters with higher effective atomic numbers, the use of BeO as the sensitive element resulted in a flat energy and angular dependence response at low energies. A significant reduction in the measurement uncertainty in the diagnostic radiology energy range was achieved.Keywords
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