Advanced Physics for Brachytherapy 2018

How efficient can MC be …?

Traditionally, MC was said to be too slow for clinical use and therefore reserved for high quality single source dosimetry in reference conditions that was then partitioned to TG-43 quantities and used in TPS for treatment planning purposes.

➢ Total t

CALC scales with N, which is determined by the level of desired type A

uncertainty which is proportional to

N k Var )(

➢ MC for Brachy enjoys t

CALC /N reduction from photon only tracking (20%-70%)

➢ In brachy however, t

CALC /N is large when multiple scattering occurs