Predictive gamma passing rate for three-dimensional dose verification with finite detector elements via improved dose uncertainty potential accumulation model.
complexity metric
dose uncertainty
gamma passing rate
Journal
Medical physics
ISSN: 2473-4209
Titre abrégé: Med Phys
Pays: United States
ID NLM: 0425746
Informations de publication
Date de publication:
Mar 2020
Mar 2020
Historique:
received:
31
07
2019
revised:
03
12
2019
accepted:
14
12
2019
pubmed:
22
12
2019
medline:
30
12
2020
entrez:
22
12
2019
Statut:
ppublish
Résumé
We aim to develop a method to predict the gamma passing rate (GPR) of a three-dimensional (3D) dose distribution measured by the Delta4 detector system using the dose uncertainty potential (DUP) accumulation model. Sixty head-and-neck intensity-modulated radiation therapy (IMRT) treatment plans were created in the XiO treatment planning system. All plans were created using nine step-and-shoot beams of the ONCOR linear accelerator. Verification plans were created and measured by the Delta4 system. The planar DUP (pDUP) manifesting on a field edge was generated from the segmental aperture shape with a Gaussian folding on the beam's-eye view. The DUP at each voxel ( It was confirmed that the coefficient The DUP-based predicting method of the GPR was extended to 3D by introducing DUP attenuation and an optimized analytical LM to compensate for the low statistics of the learning data due to a finite number of detector elements. The precision of the predicted GPR is expected to be improved by improving the LM and by involving other metrics.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1349-1356Informations de copyright
© 2019 American Association of Physicists in Medicine.
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