A multi-institutional evaluation of small field output factor determination following the recommendations of IAEA/AAPM TRS-483.

ABSTRACT:

Purpose

The aim of this work was to test the implementation of small field dosimetry following TRS-483 and to develop quality assurance procedures for the experimental determination of small field output factors (SFOFs).

Materials and methods

Twelve different centers provided SFOFs determined with various detectors. Various linac models using the beam qualities 6 MV and 10 MV with flattening filter and without flattening filter were utilized to generate square fields down to a nominal field size of 0.5 cm × 0.5 cm. The detectors were positioned at 10 cm depth in water. Depending on the local situation, the source-to-surface distance was either set to 90 cm or 100 cm. The SFOFs were normalized to the output of the 10 cm × 10 cm field. The spread of SFOFs measured with differe

SUBMITTER: Lechner W 

PROVIDER: S-EPMC9541513 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature