Skip to main content

Table 1 Materials and components of range shifter

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

  1. H: hydrogen; C: carbon; N: nitrogen; O: oxygen; Si: silicon; Al: aluminum