title: A simple approach for EPID dosimetric calibration to overcome the effect of image-lag and ghosting.
abstract: EPID dosimetry has known drawbacks. The main issue is that a measurable residual signal is observed after the end of irradiation for prolonged periods of time, thus making measurement difficult. We present a detailed analysis of EPID response and suggest a simple, yet accurate approach for calibration that avoids the complexity of incorporating ghosting and image-lag using the maximum integrated signal instead of the total integrated signal. This approach is linear with dose and independent of dose rate.
authors.affiliation: Department of Physics, CNRP, University of Surrey, and Royal Surrey County Hospital, NHS Foundation Trust, Guildford, UK. mukhtar@physicist.net
authors.forename: Mukhtar
authors.initials: M
authors.lastname: Alshanqity
authors.forename: Simon
authors.initials: S
authors.lastname: Duane
authors.forename: Andrew
authors.initials: A
authors.lastname: Nisbet