Table 1.
Summary of facilities and D10, D37, SF2 and RBEs
| Facility | A | B | C | D | E | F | Average | CV (%) |
|---|---|---|---|---|---|---|---|---|
| Year of experiment | 2000 | 2001 | 2002 | 2002 | 2002 | 2011 | ||
| Proton energy (MeV) | 190 | 180 | 190 | 190 | 200 | 235 | ||
| Dose rate (Gy/min) | ∼1.5 | ∼2.0 | 1.6–2.7 | 1.0–1.5 | 0.9–1.3 | ∼3.0 | ||
| Reference X-ray (MeV) | 4 | 4 | 6 | 4 | 4 | |||
| Proton D10 (Gy) | 5.1 | 4.97 | 4.91 | 5.32 | 4.92 | 4.68 | 4.98 | 4.3 |
| Proton D37 (Gy) | 2.87 | 2.44 | 2.72 | 3.09 | 2.9 | 2.44 | 2.74 | 9.5 |
| Proton SF2 | 0.655 | 0.557 | 0.687 | 0.707 | 0.628 | 0.458 | 0.615 | 15.1 |
| X-ray D10 (Gy) | 5.25 | 5.29 | 5 | 5.42 | b | 5.1 | 5.21 | 3.1 |
| X-ray D37 (Gy) | 2.88 | 2.97 | 2.88 | 3.13 | b | 2.87 | 2.95 | 3.8 |
| X-ray SF2 | 0.655 | 0.655 | 0.621 | 0.704 | 0.541 | 0.635 | 9.5 | |
| RBE10a | 1.03 ± 0.06 | 1.06 ± 0.05 | 1.02 ± 0.06 | 1.02 ± 0.05 | 1.07 ± 0.06 | 1.09 ± 0.03 | 1.05 | 2.8 |
| RBE37a | 1.00 ± 0.05 | 1.22 ± 0.14 | 1.06 ± 0.05 | 1.01 ± 0.06 | 1.02 ± 0.07 | 1.18 ± 0.10 | 1.08 | 8.6 |
The width of the SOBP was 60 mm for all facilities. aRBE at 10% and 37% survival levels; values are the average and SD for each facility. bThere was no High-energy LINAC X-ray machine available at facility E. Averaged values from facilities A–D were used in the RBE calculation.