ESTRO 2025 - Abstract Book

S2640

Physics - Detectors, dose measurement and phantoms

ESTRO 2025

Figure 2: Experimental data with the fitted function and the deviation from the fitted curve for 6MVFFF beams The present fitting curves will be shared with the remaining 17 centers for predicting FOFs to compare with experimental measurements, so that the fitting parameters will be validated. Conclusion: This study showed a high consistency in small filed dosimetry in the involved centres using a new generation plastic scintillator detector. The adopted methodology resolves the ambiguity in reporting and interpreting small field dosimetric quantities and facilitates a clear dosimetric comparison across a population of linacs.

Keywords: small field, output factor, equivalent field size

References: 1) Sauer and Wilbert, Med. Phys. 34,6, June 2007

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Digital Poster Patient specific quality assurance – dose at point calculations in RadCalc, EPIgray and Ruby phantom Oliwia Nowotka 1 , Maksymilian Kazior 1 , Agata Lewandowska 1,2 , Dorota Borowicz 1 , Anna Kociemba 1 , Justyna Krupka 1 1 Medical Physics Department, Affidea Cancer Treatment Centre, Poznań, Poland. 2 Department of Biomedical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland Purpose/Objective: Comparison of dose at isocenter calculated for RadCalc software, EPIgray, and measured with MicroDiamond detector in the Ruby base phantom vs. data from treatment planning system (TPS) Monaco.