Verification system for intensity-modulated radiation therapy with scintillator.
Dose verification
IMRT
Radiation therapy
Scintillator
Journal
Physical and engineering sciences in medicine
ISSN: 2662-4737
Titre abrégé: Phys Eng Sci Med
Pays: Switzerland
ID NLM: 101760671
Informations de publication
Date de publication:
Mar 2021
Mar 2021
Historique:
received:
07
04
2020
accepted:
06
11
2020
pubmed:
19
11
2020
medline:
25
11
2021
entrez:
18
11
2020
Statut:
ppublish
Résumé
In the preparation of intensity-modulated radiation therapy (IMRT), patient-specific verification is widely employed to optimize the treatment. To accurately estimate the accumulated dose and obtain the field-by-field or segment-by-segment verification, an original IMRT verification tool using scintillator light and an analysis workflow was developed in this study. The raw light distribution was calibrated with respect to the irradiated field size dependency and light diffusion in the water. The calibrated distribution was converted to dose quantity and subsequently compared with the results of the clinically employed plan. A criterion of 2-mm dose-to-agreement and 3% dose difference was specified in the gamma analysis with a 10% dose threshold. By applying the light diffusion calibration, the maximum dose difference was corrected from 7.7 cGy to 3.9 cGy around the field edge for a 60 cGy dose, 7 × 7 cm
Identifiants
pubmed: 33206366
doi: 10.1007/s13246-020-00946-4
pii: 10.1007/s13246-020-00946-4
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
9-21Subventions
Organisme : Japan Society for the Promotion of Science
ID : 15H04912
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