Investigation of TLD and EBT3 performance under the presence of 1.5T, 0.35T, and 0T magnetic field strengths in MR/CT visible materials.
MR linac
MRIgRT
MRgRT
MRgRT dosimeters
dosimeters in magnetic fields
Journal
Medical physics
ISSN: 2473-4209
Titre abrégé: Med Phys
Pays: United States
ID NLM: 0425746
Informations de publication
Date de publication:
Jul 2019
Jul 2019
Historique:
received:
01
06
2018
revised:
17
12
2018
accepted:
17
12
2018
pubmed:
6
4
2019
medline:
18
12
2019
entrez:
6
4
2019
Statut:
ppublish
Résumé
The aim of this study was to investigate thermoluminescent dosimeters (TLD) and radiochromic EBT3 film inside MR/CT visible geometric head and thorax phantoms in the presence of: 0, 0.35, and 1.5 T magnetic fields. Thermoluminescent Dosimeters reproducibility studies were examined by irradiating IROC-Houston's TLD acrylic block five times under 0 and 1.5 T configurations of Elekta's Unity system and three times under 0 and 0.35 T configurations of ViewRay's MRIdian Cobalt-60 ( Average TLD block measurements which, compared the magnetic field effects (magnetic field vs 0 T) on the Unity and MRIdian systems, were 0.5% and 0.6%, respectively. The average ratios between magnetic field effects for the geometric thorax and head phantoms under the Unity system were -0.2% and 1.6% and for the MRIdian system were 0.2% and -0.3%, respectively. Beam profiles generated with both systems agreed with Monte Carlo measurements and previous literature findings. TLDs and EBT3 film dosimeters could potentially be used in MR/CT visible tissue equivalent phantoms that will experience a magnetic field environment.
Identifiants
pubmed: 30950071
doi: 10.1002/mp.13527
pmc: PMC9673483
mid: NIHMS1849293
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
3217-3226Subventions
Organisme : NCI NIH HHS
ID : U24 CA180803
Pays : United States
Organisme : United States Department of Health and Human Services
Organisme : Andrew Sabin Family Foundation
Organisme : NCI NIH HHS
ID : U24 CA180803
Pays : United States
Informations de copyright
Published 2019. This article is a U.S. Government work and is in the public domain in the USA.
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