Dose Course 2018_Flipping book

TRS-483: formalism for reference dosimetry in FFF beams

Main issues to consider that lead to differences in beam

quality correction factors between WFF and FFF :

b)

Differences in (Sw,air) Q

as a function of BQI

c)

Differences in perturbations factors, other than p vol

d)

Volume averaging due to the non-uniform lateral beam

Dalaryd, Knöös & Ceberg, Med Phys, 41(11), 2014

profile

in FFF beams

TRS-398

TRS-483

In TRS-483: Corrections tabulated vs BQI

Only volume averaging corrections provided.

Fluence perturbation corrections and corrections for perturbations due to changes in beam spectra not known