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2D detectors [EPID]

McNutt

Med Phys (23) 1996

Pasma

IJROBP (45) 1999

Van Esch

Radiother Oncol (60) 2001

D

EPID_meas

= D

EPID_calc

?

1 – Forward from transit images

Measure transit EPID dose (D

EPID_meas

)

Extend patient CT data to EPID level and

calculate TPS EPID dose (D

EPID_calc

)

Compare measured with calculated EPID

dose