Evaluation of a Monte Carlo based EPID system for patient-specific IMRT and VMAT quality assurance.

ABSTRACT:

Purpose

This study aims to evaluate the performance of a new electronic portal imaging device (EPID) system with a Monte Carlo (MC) based algorithm for patient-specific quality assurance (PSQA), ensuring its reliability and effectiveness in treatment verification efficiency and precision.

Methods

Sixteen patients with various tumor sites were divided evenly into two groups for dynamic intensity-modulated radiation therapy and volumetric modulated arc therapy verification. Measurements were performed on a UIH uRT-linac 506c linear accelerator with a Varex Imaging XRD 1642 EPID. The performance of the EPID was assessed for sensitivity to errors in monitor units, collimator angle, field offset, field size, and multi-leaf collimator functionality. Treatment plans were modified f

SUBMITTER: Sun W 

PROVIDER: S-EPMC12260258 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature