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Current Directions in Biomedical Engineering

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Buzug, Thorsten M. / Haueisen, Jens / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Kraft, Marc / Lenarz, Thomas / Leonhardt, Steffen / Malberg, Hagen / Penzel, Thomas / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Urban, Gerald A.

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2364-5504
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Optimal orientation for ionization chambers in MRgRT reference dosimetry

Stefan Pojtinger
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  • University Hospital Tübingen, Department of Radiation Oncology, Section for Biomedical Physics, Hoppe-Seyler-Straße 3, 72076 Tübingen, Germany
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/ Oliver S. Dohm
  • University Hospital Tübingen, Department of Radiation Oncology, Division for Medical Physics, Hoppe-Seyler-Straße 3, 72076 Tübingen, Germany
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/ Daniela Thorwarth
  • University Hospital Tübingen, Department of Radiation Oncology, Division for Medical Physics, Hoppe-Seyler-Straße 3, 72076 Tübingen, Germany
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Published Online: 2017-09-07 | DOI: https://doi.org/10.1515/cdbme-2017-0056

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.

Keywords: MR-Linac; MRgRT; Reference Dosimetry; Monte Carlo Simulation; EGSnrc, Radiotherapy

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Published Online: 2017-09-07


Citation Information: Current Directions in Biomedical Engineering, Volume 3, Issue 2, Pages 273–275, ISSN (Online) 2364-5504, DOI: https://doi.org/10.1515/cdbme-2017-0056.

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©2017 Stefan Pojtinger et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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