Table 1 Build-up caps used for measurements
From: Collimator scatter factor: Monte Carlo and in-air measurements approaches
Type | Material | Thickness | Water-equiv. thickness | Energy range | Diameter | Name in the work |
|---|---|---|---|---|---|---|
T30001.3.103 | Acrylic | 9.5 mm | 11.0 mm | 4–6 MV | 26.3 mm | PMMA_11 |
T30001.3.104 | Acrylic | 13.8 mm | 16.0 mm | 6–8 MV | 34.9 mm | PMMA_16 |
T30001.3.106 | Acrylic | 24.6 mm | 28.5 mm | 10–20 MV | 56.5 mm | PMMA_28 |
T30001.3.107 | Acrylic | 34.7 mm | 40.2 mm | 20–30 MV | 76.7 mm | PMMA_40 |
T30000.3.202 | Brass | 2.4 mm | 16.7 mm | 4–6 MV | 12.1 mm | Brass_17 |
T30000.3.205 | Brass | 8.0 mm | 55.8 mm | 10–20 MV | 23.3 mm | Brass_56 |