Table 2.

Summary of the ${\text{Pinnacle}}^3$ model parameters, with the parameters of the MLCi model for comparison.

Parameter a	Agility Value	MLCi Value
Source A‐B dimension (cm)	0.01	0.01
Source G‐T dimension (cm)	0.01	0.01
Gaussian height (cm)	0.04	0.05
Gaussian width (cm)	1.0	1.0
Off‐axis softening factor	10.48	10.76
X b ‐collimator transmission (%)	1.5 c	9.5
Y b ‐collimator transmission (%)	1.5	0.1
MLC transmission (%)	0.5	0.1
Leaf tip radius (cm)	17.0	15.0
Tongue‐and‐groove width (cm)	0.1	0.175
Interleaf leakage transmission (%)	0.2	3.0
Maximum gantry speed (°${\mathrm{s}}^{-1}$)	5.5	5.5
Maximum collimator speed (${\text{cms}}^{-1}$)	8.5	1.5
Maximum MLC leaf speed (${\text{cms}}^{-1}$)	3.0	2.0

^aThe reader is referred to Starkschall et al.( ⁵ ) for a description of the parameters.

^bIEC61217 convention.

^cNot applicable in practice, as the Agility head does not have X‐collimators.