Table 6.

Parameters to model the absorbed dose from the phantom-scattered photons. All parameters are from an iterative fitting procedure from this work.

Symbol	Description	d=1.5 cm	d=10 cm
κFA	Constant of proportionality for the double-Gaussian amplitude $(\mathrm{m}\mathrm{G}\mathrm{y}·\mathrm{G}{\mathrm{y}}^{-1}·\mathrm{m}{\mathrm{m}}^{-2·\frac{1}{\mathrm{w}}·\frac{1}{\mathrm{b}}})$	3.8×10−2
w	Exponent defining power law relationship between the amplitude and field area	1.7
b	Exponent defining power law relationship between amplitude and depth	1.9
κPS,σ,1	Constant of proportionality for the width parameter of Gaussian 1 $(\mathrm{m}\mathrm{m}·\mathrm{m}{\mathrm{m}}^{\frac{-1}{\mathrm{f}}})$	12
f	Exponent defining power law relationship between width parameter of Gaussian 1 and field size	3.0
κPS,σ,2	Constant of proportionality for the width parameter of Gaussian 2 $(\mathrm{m}\mathrm{m}·\mathrm{m}{\mathrm{m}}^{\frac{-1}{\mathrm{h}}})$	1.1
h	Exponent defining power law relationship between width parameter of Gaussian 2 and field area	1.6
C	Partitioning factor for the two Gaussians making up the phantom-scatter double-Gaussian	0.59	0.80
αPS,1	Adjustment parameter to the μd of the phantom-scattered photons in Gaussian 1	1.7
αPS,2	Adjustment parameter to the μd of the phantom-scattered photons in Gaussian 2	2.5