IMRT

Field-size depenence of Output-factor ‘explained’ …

courtesy M. Sikora

small fields: • secondary source almost shielded (=only minimal head scatter contribution) • OF-dependence mainly due to partial shielding of primary source

large fields: • primary source fully visible • OF-dependence mainly due to partial shilding of secondary source

ESTRO IMRT course 2015 Dose Calculation in Static and Rotational IMRT Brussels October 8th, 2015

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