A study of the interplay effect for VMAT SBRT using a four-axes motion phantom.
interplay
motion
radiotherapy
respiratory
stereotactic body radiation therapy (SBRT)
volumetric modulated arc therapy (VMAT)
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:
Aug 2020
Aug 2020
Historique:
received:
23
01
2020
revised:
08
05
2020
accepted:
11
05
2020
pubmed:
24
6
2020
medline:
22
6
2021
entrez:
24
6
2020
Statut:
ppublish
Résumé
To assess the accuracy of volumetric modulated arc therapy (VMAT) stereotactic body radiation therapy (SBRT) when treating moving targets (such as lung or liver lesions), focusing on the impact of the interplay effect in the event of complex breathing motion and when a gating window is used. A dedicated programmable motion platform was implemented. This platform can carry large quality assurance (QA) phantoms and achieve complex three-dimensional (3D) motion. Volumetric modulated arc therapy SBRT plans were delivered with TrueBeam linac to this moving setup and the measured dose was compared to the computed one. Several parameters were assessed such as breathing period, dose rate, dose prescription, shape of the breathing pattern, the use of a planning target volume (PTV) margin, and the use of a gating window. Loss of dose coverage (D95%) was acceptable in most situations. The doses received by 95% of the CTV, D95% ( In our clinical context, treating lung and liver lesions using VMAT SBRT is reasonable. The interplay effect was moderated and acceptable in all simulated situations.
Identifiants
pubmed: 32573908
doi: 10.1002/acm2.12947
pmc: PMC7484847
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
208-215Informations de copyright
© 2020 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.
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