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DETECTORS FOR MEASUREMENT-2D/3D detectors
CALIBRATION OF EPID
correction factors
THE INTENSITY AT EACH POINT IN THE IMAGE MUST BE CALIBRATED IN A QUANTITATIVE
SENSE
The dose response of each pixel point must be known
The effects of scattered radiation in the detector must be understood
The temporal stability of the detector must be known.
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Utretch 2016
DEPENDING ON THE DETECTOR: DIFFERENT CORRECTION FACTORS CAN BE EXPECTED
Field size
Air gap between the phantom/patient exit surface and the detector (transmission measurements)
Other parameters