The feasibility of using coplanar-only VMAT combined with "Treat" function to replace non-coplanar VMAT for SRS of 2 to 6 brain metastases.

ABSTRACT:

Background

Recent advancements in radiotherapy technology have made it possible to implement single-isocenter noncoplanar volumetric modulated arc therapy (NC-VMAT) for stereotactic radiosurgery (SRS) of multiple brain metastases (BMs). This study aimed to demonstrate the dosimetric feasibility of combining coplanar-only single-isocenter VMAT with the "Treat" function as a potential alternative to conventional single-isocenter NC-VMAT for intracranial multitarget SRS.

Methods

Eleven patients with 2-6 BMs previously treated with conventional single-isocenter NC-VMAT SRS were retrospectively selected. In NC-VMAT, the collimator angle of each arc was manually adjusted to mitigate the "island blocking" problem. For comparison, each NC-VMAT plan was replanned via coplanar-only si

SUBMITTER: Lai J 

PROVIDER: S-EPMC12682475 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature