Lateral Penumbra Modelling Based Leaf End Shape Optimization for Multileaf Collimator in Radiotherapy

Table 6

Results of TST model based optimization and empirical method compared with actual leaf ends.

Type	Actual shape (cm)	Empirical method (cm)	TST model (cm)
Elekta Agility 160-leaf MLC			R = 16.805,
Varian Millennium 120 MLC	, = 11.3°		R = 12.354,

SCD = 35.1 cm, leaf height = 9 cm [14].
SCD = 51.02 cm, leaf height = 5.65 cm [15]. Angle denotes the angle between line segment of piecewise leaf end curve and collimator rotation axis.