IMRT

Sensitivity of gamma analysis on a 2D dataset

TPS vs EBT

Gamma may be unable to detect systematic errors that could/should be corrected Same gamma parameters give different results in combination with different detectors Stricter gamma parameters are not necessarily the most sensitive Criteria for ‘flagging’ a dose distribution mostly based on previous clinical experience. Initial inaccuracies in IMRT verification may have a long lasting influence.

TPS vs Mapcheck

Yan et al, JACMP 2009