Characterization of a novel large-area electronic portal imaging device system for a ring-shaped HalosTx linear accelerator in radiotherapy quality assurance.

ABSTRACT:

Background

Electronic portal imaging device (EPID)-based in vivo dosimetry (IVD) has attracted considerable interest in recent years. Nevertheless, the limited detection area of conventional EPID systems has hindered their broad clinical adoption. Therefore, this study evaluated a novel large-area EPID (65 cm × 61 cm) integrated into the HalosTx linear accelerator (linac), focusing on stability, imaging quality, field coverage, and error sensitivity for radiotherapy quality assurance (QA).

Methods

Basic physical characteristics, including short-term repeatability, dose-response linearity, the influence of gantry angle on dose, and dose-rate dependencies, were first tested. Megavolt (MV) imaging quality tests were then performed to evaluate scaling, spatial resolution, unifor

SUBMITTER: Dai G 

PROVIDER: S-EPMC12780731 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature