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How does the algorithm work?
1. EPID Dose Response
2. Lateral Scatter within the EPID
3. Scatter from the patient
4
. The attenuation of the beam by the phantom or
patient.
5. The distance from the radiation source to the
EPID plane and to the dose-reconstruction plane.
6. The scatter within the phantom or patient
Dose to any
point inside
the patient
EPID
dose
calculation
algorithm
Primary dose
map at EPID
plane