777 / 1245
Pencil beam based models
Transport
o
PB kernels determined in water from MC and/or measurements
o
Transport scaled by mass or electron density
1
❖
In principle one either use water as medium or
❖
introduce a medium during scaling
o
Dose deposit in water
Deposit
o
No conversion to medium during absorption
Thus on general we have however it can in principle be
April 2017
21
,
1)
Scales best electron density according to Seco and Evans, Med Phys 2006,
but important to check what the specific TPS requires
,