ESTRO course Dose Modelling and Verification 2017

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Page Background

2D detectors [EPID]

Calibration for

absolute

dosimetry

SDD fixed

Ic depth of Dmax

EPID measurement

Small ROI near

central axis

Ion chamber measurement

thickness

thickness

http://radonc.ucsf.edu/research_group/jpouliot/tutorial/main.htm

Chen et al. Med. Phys 33(3), 2006

1. Dose Response of the

EPID

2. Lateral Scatter within

the EPID

3. Scatter from the patient

Apply a sensitivity matrix

correction (get back the

image before the flood

field correction)