Efficient MLC quality assurance using a virtual picket fence test in an MR-Linac.

ABSTRACT:

Background

The Elekta Unity MR-Linac system integrates magnetic resonance imaging (MRI) with a linear accelerator (Linac) for adaptive radiation therapy. Traditional quality assurance (QA) methods for multi-leaf collimators (MLCs) face challenges in this system due to the magnetic field and limited field size of electronic portal imaging devices (EPID).

Purpose

This study aims to develop a 'virtual picket fence' test using machine log files to evaluate MLC performance in the Elekta Unity MR-Linac system, providing a more efficient and comprehensive QA method that overcomes the limitations of traditional approaches.

Methods

A picket fence test plan with 11 segments was delivered on the Elekta Unity system. Maximum absolute error and root mean square (RMS) error for eac

SUBMITTER: Yuan K 

PROVIDER: S-EPMC12408376 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature