Advanced Brachytherapy Physics - Vienna 2016

Type B uncertainty … input  Phantom geometry (for single source dosimetry) Remember dose from scatter depends on geometry dimensions…! or patient segmentation and source/applicator position (for patient dosimetry)

 Geometry in simulation for S K

(for single source dosimetry)

In order to comply with the definition of S K : Ai ( i t) d t t t l di t f i • r po n e ec or a arge s ance rom e source n vacuo th

• Photon emissions of energy lower than δ=5 keV (i.e. characteristic x-rays of Ti encapsulation following photoelectric absorption of 125I photons) must be suppressed.