A Mathematical Method to Adjust MLC Leaf End Position for Accurate Dose Calculation in Carbon Ion Beam Radiation Therapy Treatment Planning System

Table 1

Nine MLC materials including the percentage compositions of each MLC materials denoted as subscript symbols with straggling range were listed for this study.

MLC material	Composition	Density (g/cm^3)	MLC thickness (cm)	Struggling range (cm)
W100	100%	19.3	6.24	2.62
W90Cu10	W-90% Cu-10%	17.34	6.7	2.85
W50Cu50	W-50% Cu-50%	12.25	8.32	3.66
Fe100	100%	7.87	11	5
Ni100	100%	8.9	9.6	4.3
Cu	100%	8.96	10	4.5
Cu59Zn41(H59)	Cu-59% Zn-41%	8.4	10.6	4.8
FeCrNiMn(SS304)	Fe-69.5%, Cr-19, Ni-9.5%Mn-2%	7.92	10.8	4.9
Al100	100%	2.7	27	13