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2D detectors [EPID]
EPID
primary
fluence
dose
calculation
algorithm
3. Predict primary fluence from transit images
Measure transit EPID dose
Convert to dose at EPID level
Deconvolve EPID dose with lateral scatter kernel and
back-project through patient/phantom to estimate primary
fluence
Use primary fluence as input to calculate dose distribution
in patient/phantom
Hansen
Med Phys (23) 1996
Kapatoes
Med Phys (28) 2001
Partridge
Med Phys (29) 2002