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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