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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
:
•
Air (point) detector at large distance from the source in vacuo
•
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.