Robustness of Breast Margins with Volumetric Modulated Arc Therapy without a Six-Degrees-of-Freedom Couch: A Dosimetric Evaluation.
VMAT
breast cancer
planning margins
Journal
Journal of clinical medicine
ISSN: 2077-0383
Titre abrégé: J Clin Med
Pays: Switzerland
ID NLM: 101606588
Informations de publication
Date de publication:
21 Jan 2023
21 Jan 2023
Historique:
received:
12
12
2022
revised:
10
01
2023
accepted:
19
01
2023
entrez:
11
2
2023
pubmed:
12
2
2023
medline:
12
2
2023
Statut:
epublish
Résumé
In our hospital, a TrueBeam linear accelerator and the PerfectPitch 6-degrees-of-freedom (6-DOF) couch (Varian), with 7 mm margins, are used for volumetric modulated arc therapy (VMAT) of breast cancer (BC). This study tested whether a 3-degrees-of-freedom (3-DOF) couch, i.e., without rotation compensation (such as the Halcyon couch), affected dose metrics. A total of 446 daily extended cone beam computed tomography (CBCT) data of 20 patients who received VMAT for BC were used to recalculate the treatment plans with the session registration (6-DOF) and a simulated matching with 3-DOF. The initial plan provided significantly better coverage for internal mammary chain and clavicular lymph node clinical target volumes (CTVs) than the 6-DOF and 3-DOF CBCT plans. The volumes receiving 110% of the prescribed dose (V110%) were increased for all CTVs with the 6-DOF and 3-DOF CBCT plans, but the difference was significant only for the breast/chest wall CTV (
Identifiants
pubmed: 36769509
pii: jcm12030862
doi: 10.3390/jcm12030862
pmc: PMC9917561
pii:
doi:
Types de publication
Journal Article
Langues
eng
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