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

J. Vandecasteele; Y. De Deene

doi:10.1088/1742-6596/444/1/012104

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

J. Vandecasteele, Y. De Deene

Research output: Contribution to journal › Conference paper › peer-review

2 Citations (Scopus)

27 Downloads (Pure)

Abstract

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 language	English
Article number	012104
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Physics: Conference Series
Volume	444
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/444/1/012104
Publication status	Published - 2013
Externally published	Yes
Event	7th International Conference on 3D Radiation Dosimetry (IC3DDose) - Sydney, Australia, Sydney Duration: 4 Nov 2012 → 8 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.

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title = "Polymer gel dosimetry of an electron beam in the presence of a magnetic field",

abstract = "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.",

author = "J. Vandecasteele and \{De Deene\}, Y.",

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.; 7th International Conference on 3D Radiation Dosimetry (IC3DDose) ; Conference date: 04-11-2012 Through 08-11-2012",

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AU - Vandecasteele, J.

AU - De Deene, Y.

N1 - 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.

PY - 2013

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N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84883312132

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DO - 10.1088/1742-6596/444/1/012104

M3 - Conference paper

AN - SCOPUS:84883312132

SN - 1742-6588

VL - 444

SP - 1

EP - 5

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

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T2 - 7th International Conference on 3D Radiation Dosimetry (IC3DDose)

Y2 - 4 November 2012 through 8 November 2012

ER -

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

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