Polymer gel dosimetry of an electron beam in the presence of a magnetic field

J. Vandecasteele, Y. De Deene

Research output: Contribution to journalConference paperpeer-review

2 Citations (Scopus)
24 Downloads (Pure)


The effect of a strong external magnetic field on 4 MeV electron beam was measured with polymer gel dosimetry. The measured entrance dose distribution was compared with a calculated fluence map. The magnetic field was created by use of two permanent Neodymium (NdFeB) magnets that were positioned perpendicular to the electron beam. The magnetic field between the magnets was measured with Hall sensors. Based on the magnetic field measurement and the law of Biot-Savart, the magnetic field distribution was extrapolated. Electron trajectories were calculated using a relativistic Lorentz force operator. Although the simplified computational model that was applied, the shape and position of the calculated entrance fluence map are found to be in good agreement with the measured dose distribution in the first layer of the phantom. In combination with the development of low density polymer gel dosimeters, these preliminary results show the potential of 3D gel dosimetry in MRI-linac applications.

Original languageEnglish
Article number012104
Pages (from-to)1-5
Number of pages5
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2013
Externally publishedYes
Event7th International Conference on 3D Radiation Dosimetry (IC3DDose) - Sydney, Australia, Sydney
Duration: 4 Nov 20128 Nov 2012

Bibliographical note

Copyright the Author(s) [or listed copyright owners]. First published in Journal of physics : conference series 444 article 012104. The original publication is available at doi:10.1088/1742-6596/444/1/012104, published by IOP Publishing. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


Dive into the research topics of 'Polymer gel dosimetry of an electron beam in the presence of a magnetic field'. Together they form a unique fingerprint.

Cite this