SBRT 2016

Software upgrades: QA software

• QA phantom (Delta 4) for patient pre-treatment verification • Software upgrade: No specifics given.. • After upgrade, new calibration method needed • Ion chamber output modelled differently for small and large fields • Everything seemed ok, but.. • After some time, doing a statistical process analysis (trend analysis), on average lower pass rates were found. • Still working on how to handle this issue…