Improving the modelling of a multi-leaf collimator with tilted leaf sides used in radiotherapy.

ABSTRACT:

Background and purpose

Multi-leaf collimators (MLCs) with tilted leaf sides have a complex transmission behaviour that is not easily matched by radiotherapy treatment planning systems (TPSs). We sought to develop an MLC model that can accurately match test fields and clinically relevant plans at different centres.

Materials and methods

Two new MLC models were developed and evaluated within a research version of a commercial TPS. Prototype I used adjusted-constant transmissions and Prototype II used variable transmissions at the tongue-and-groove and leaf-tip regions. Three different centres evaluated these prototypes for a tilted MLC and compared them with their initial MLC model using test fields and patient-specific quality-assurance measurements of clinically relevant pla

SUBMITTER: Hussein M 

PROVIDER: S-EPMC10881418 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature