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2D detectors [EPID]

Louwe

Med Phys (30), 2003

Wendling

Med. Phys. (33), 2006

Med. Phys.(36), 2009

Olaciregui-Ruiz Phys. Med.Biol. (58), 2013

Ian M Hanson Phys. Med.Biol. (59), 2014

EPID

dose

calculation

algorithm

4. Back-project to dose grid from transit images

Measure open and transit EPID dose image

Estimate and subtract EPID and patient/phantom

scatter

Back-project primary dose to multiple planes to

form dose grid using CT data

Total dose = primary (based on transmission)+

patient scatter