ESTRO 2024 - Abstract Book

S3308

Physics - Detectors, dose measurement and phantoms

ESTRO 2024

Keywords: linac, small-field dosimetry, x-ray target

References:

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Dosimetry of Small Static Fields Used in External Beam Radiotherapy. Vienna: INTERNATIONAL ATOMIC

ENERGY AGENCY; 2017.

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Czarnecki D, Zink K. Monte Carlo calculated correction factors for diodes and ion chambers in small

photon fields. Physics in Medicine & Biology. 2013;58(8):2431.

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6. Scott AJ, Nahum AE, Fenwick JD. Monte Carlo modeling of small photon fields: quantifying the impact of focal spot size on source occlusion and output factors, and exploring miniphantom design for small ‐ field measurements. Medical physics. 2009;36(7):3132-44.

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Wang LL, Leszczynski K. Estimation of the focal spot size and shape for a medical linear accelerator by

Monte Carlo simulation. Medical physics. 2007;34(2):485-8.

2122

Digital Poster

characterizing a novel optically stimulated luminescent film dosimeter

Nicholas D Wilson, Siyong Kim, Rabten Datsang

Virginia Commonwealth University, Medical Physics, Richmond, USA

Purpose/Objective:

With a wide array of treatment options available in radiotherapy (RT), a wide range of dosimeters are used to perform dosimetry. A new development in dosimetric advances is a BaFBr phosphor optically stimulated luminescent (OSL) film dosimeter by Agfa. Unlike the radiographic films and radiochromic films used in radiotherapy that can only be used once, using this type of phosphor means once read, the film will lose all of its energy, making it reusable over and over. Since OSLDs have a much wider dose range, they are preferred for a variety of RT beam dosimetry tests.