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2D detectors [EPID]

Detector scatter kernel

EPID measurement

Small ROI near

central axis

Ion chamber measurement

Ic depth of Dmax

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

1. Dose Response of the

EPID

2. Lateral Scatter within

the EPID

3. Scatter from the patient

2D:

need a

second

Kernel

to model

penumbra.

Compare profiles in

the EPID with those

measured in a water

phantom.