Dose response of three-dimensional silicone-based radiochromic dosimeters for photon irradiation in the presence of a magnetic field

Morten Bang Jensen*, Peter Balling, Simon J. Doran, Jørgen B.B. Petersen, Isak H. Wahlstedt, Ludvig P. Muren

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The magnetic field in magnetic resonance imaging guided radiotherapy (MRgRT) delivery systems influences charged-particle trajectories and hence the three-dimensional (3D) radiation dose distributions. This study investigated the dose-response as well as dose-rate and fractionation dependencies of silicone-based 3D radiochromic dosimeters for photon irradiation in a magnetic field using a 0.35 T MRgRT system. We found a linear dose response up to 22.6 Gy and no significant dose-rate dependency as a function of depth. A difference in optical response was observed for dosimeters irradiated in a single compared to multiple fractions. The dosimeter showed clinical potential for verification of MRgRT delivery.
Original languageEnglish
JournalPhysics and Imaging in Radiation Oncology
Volume16
Pages (from-to)81-84
ISSN2405-6316
DOIs
Publication statusPublished - 2020

Keywords

  • 3D radiation dosimetry
  • Magnetic resonance imaging guided radiotherapy

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