Small-field dosimetry of TrueBeam^TM flattened and flattening filter-free beams: A multi-institutional analysis.

ABSTRACT:

Purpose

Detector-dependent interinstitutional variations of the beam data may lead to uncertainties of the delivered dose to patients. Here we evaluated the inter-unit variability of the flattened and flattening filter-free (FFF) beam data of multiple TrueBeam (Varian Medical Systems) linear accelerators focusing on the small-field dosimetry.

Methods

The beam data of 6- and 10-MV photon beams with and without flattening filter measured for modeling of an iPLAN treatment planning system (BrainLAB) were collected from 12 institutions - ten HD120 Multileaf Collimator (MLC) and two Millennium120 MLC. Percent-depth dose (PDD), off-center ratio (OCR), and detector output factors (OF_det ) measured with different detectors were evaluated. To investigate the detector-assoc

SUBMITTER: Akino Y 

PROVIDER: S-EPMC6964782 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature