Quality assurance of single isocentre multiple target stereotactic radiosurgery: Findings from long-term off-axis Winston-Lutz testing and machine performance checks.

ABSTRACT:

Background

Single-isocenter multiple-target stereotactic radiosurgery (SIMT SRS) has emerged as an efficient treatment for multiple brain metastases. However, this technique demands exceptional geometric accuracy, particularly off-axis, to ensure optimal dose delivery while sparing healthy tissue. Traditional quality assurance (QA) methods require adaptation for SIMT SRS, highlighting the need for robust testing protocols.

Purpose

This study aimed to evaluate the long-term off-axis targeting accuracy of three Varian TrueBeam linear accelerators using a dedicated off-axis Winston-Lutz test (OAWLT) and to investigate correlations with routine varian machine performance check (MPC) results.

Materials & methods

Weekly OAWLT measurements were performed over a 6-month perio

SUBMITTER: Poder J 

PROVIDER: S-EPMC12483765 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature