Quality audits of small field output factors: a multi-centre pilot study.

Abstract

A new co-ordinated research project (CRP) was launched by the IAEA for the national audit networks for radiotherapy with the purpose of developing the methodology for remotely auditing IMRT related QA. The programme involves three audit steps: (1) remote verification of TPS calculation of small field output factors relevant for IMRT and audit of MLC positional performance, (2) audit of single clinical IMRT field dose delivery and (3) ‘end-to-end’ audit (imaging, planning, dose delivery) for multiple field IMRT techniques. New procedures and phantoms are being developed and examined through multi-centre pilot studies involving CRP participants.