Dose Course 2018_Flipping book

11

Further additions

❑ The SSD dependence have to be added

❑ The dose due to bremsstrahlung was originally subtracted from the measured depth–dose curve.

o This must now be added back to the electron dose, after putting back the inverse square law dependence.

o It is assumed that the dose beyond the depth of the practical range is entirely due to photons.

From Handbook of Radiotherapy Physics Ed Mayles, Nahum and Rosenwald

Dublin 2018