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BY-NC-ND 4.0 license Open Access Published by De Gruyter September 7, 2017

Optimal orientation for ionization chambers in MRgRT reference dosimetry

  • Stefan Pojtinger EMAIL logo , Oliver S. Dohm and Daniela Thorwarth

Abstract

The interest in hybrid systems combining magnetic resonance imaging and medical linear accelerator (MR-Linac) is rapidly increasing due to the clinical availability of different systems. Reference dosimetry is a critical issue for integrating these devices into clinical practice. However, the response of ionization chambers changes according to the distinct orientation of the chamber with respect to the magnetic field. In this study, we have carried out Monte Carlo simulations to identify an optimal orientation for thimble type chambers in MRgRT reference dosimetry. Our findings suggest that an orientation where the chamber axis is parallel to the magnetic field axis should be preferred.

Published Online: 2017-09-07

©2017 Stefan Pojtinger et al., published by De Gruyter

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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