IMRT 2018

Field-size dependence 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 shielding of secondary source

ESTRO IMRT course 2017 Dose Calculation in Static and Rotational IMRT Madrid April 13th, 2017

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