Optimal orientation for ionization chambers in MRgRT reference dosimetry

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 respon...

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Bibliographic Details
Published in:Current directions in biomedical engineering 2017-09, Vol.3 (2), p.273-275
Main Authors: Pojtinger, Stefan, Dohm, Oliver S., Thorwarth, Daniela
Format: Article
Language:English
Subjects:
EGSnrc, Radiotherapy
Monte Carlo Simulation
MR-Linac
MRgRT
Reference Dosimetry
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Summary: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.
ISSN:2364-5504
2364-5504
DOI:10.1515/cdbme-2017-0056