Characterizing magnetically focused contamination electrons by off-axis irradiation on an inline MRI-Linac.
dosimetry
electron contamination
inline MRI-Linac
magnetic field
radiotherapy
skin dose
Journal
Journal of applied clinical medical physics
ISSN: 1526-9914
Titre abrégé: J Appl Clin Med Phys
Pays: United States
ID NLM: 101089176
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
revised:
10
12
2021
received:
02
11
2021
accepted:
02
03
2022
pubmed:
26
3
2022
medline:
16
6
2022
entrez:
25
3
2022
Statut:
ppublish
Résumé
The aim of this study is to investigate off-axis irradiation on the Australian MRI-Linac using experiments and Monte Carlo simulations. Simulations are used to verify experimental measurements and to determine the minimum offset distance required to separate electron contamination from the photon field. Dosimetric measurements were performed using a microDiamond detector, Gafchromic Off-axis irradiation separates the majority of electron contamination from an x-ray beam and was found to significantly reduce in-field surface dose. For the 1.9 × 1.9, 5.8 × 5.8, and 9.7 × 9.6 cm Experimental and simulation data were acquired for a range of field sizes to investigate off-axis irradiation on an inline MRI-Linac. The skin sparing effect was observed with off-axis irradiation, a feature that cannot be achieved to the same extent with other methods, such as bolusing, for beams at isocenter.
Identifiants
pubmed: 35333000
doi: 10.1002/acm2.13591
pmc: PMC9195023
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e13591Informations de copyright
© 2022 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, LLC on behalf of The American Association of Physicists in Medicine.
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