From: Applications of various range shifters for proton pencil beam scanning radiotherapy
Range shifter | Materials | Density (g/cc) | Thickness (cm) | Components |
---|---|---|---|---|
USB | Polyurethane | 1.2 | 6.5 | 9.4% H, 64.2% C, 3.1% N, 23.3% O |
ALB | Polyurethane | 1.2 | 7.4 | 9.4% H, 64.2% C, 3.1% N, 23.3% O |
CTB | G-10 | 1.85 | 3.5 | 54% O, 38% Si, 8% Al, and 1 mm C on top and bottom |
IBA MRS | Lexan | 1.2 | 6.48 | 5.5% H, 75.6% C, 18.9% O |