Erlangen 2026 – scientific programme

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ST: Fachverband Strahlen- und Medizinphysik

ST 3: Detectors for Medical Applications

ST 3.7: Talk

Wednesday, March 18, 2026, 15:15–15:30, KH 01.013

Active Eye Lens Dosimetry with Dosepix: Influence of Measurement Position and Lead Glass Shielding — •Leonie Ullmann¹, Florian Beißer¹, Rolf Behrens², Stefan Funk¹, Gerhard Hilgers², Oliver Hupe², Jürgen Roth², Tom Tröltzsch³, Hayo Zutz², and Thilo Michel¹ — ¹Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany — ²Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ³Karlsruher Institut für Technologie, Karlsruhe, Germany

Due to its sensitivity to radiation, the eye lens is subject to strict dose limits. Since exceeding these limits can lead to cataracts, precise monitoring of the dose in the eye is necessary. For this purpose, an active personal dosemeter for the eye lens has been developed for use by medical personnel. Previous investigations have shown that the prototype of this dosemeter delivers reliable results. Since the eye lens dosemeter is intended to be worn on the side of the head, follow-up studies now examined the effects of the measurement position for frontal and lateral positioning.

Furthermore, it is common practice for medical personnel to wear radiation protection glasses. As an approach to reproduce the absorption of such glasses, the attachment of lead glass pieces to the dosemeter was investigated. The resulting dose values were compared to those of thermoluminescent dosemeters (TLDs) behind radiation protection glasses.

Keywords: active personal dosimetry; eye lens dosimetry; radiation detectors for medical applications; semiconductor detectors; Dosepix