Longitudinal assessment of quality assurance measurements in a 1.5T MR-linac: Part I-Linear accelerator.

ABSTRACT:

Purpose

To describe and report longitudinal quality assurance (QA) measurements for the mechanical and dosimetric performance of an Elekta Unity MR-linac during the first year of clinical use in our institution.

Materials and methods

The mechanical and dosimetric performance of the MR-linac was evaluated with daily, weekly, monthly, and annual QA testing. The measurements monitor the size of the radiation isocenter, the MR-to-MV isocenter concordance, MLC and jaw position, the accuracy and reproducibility of step-and-shoot delivery, radiation output and beam profile constancy, and patient-specific QA for the first 50 treatments in our institution. Results from end-to-end QA using anthropomorphic phantoms are also included as a reference for baseline comparisons. Measurements

SUBMITTER: Subashi E 

PROVIDER: S-EPMC8504604 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature