Table 1. Physical doses with the biologically effective doses (BED) 60 and 48 Gy relative to a prescribed dose with the BED 80 Gy in 1-10 fractions.
*The percentages of the physical doses with the BED10 of ≥60.00 Gy and ≥48.00 Gy relative to the physical doses (100%) with the BED10 of ≥80.00 Gy in 1-10 fraction(s), in which those in 2, 7, and 9 fractions are excluded.
The physical dose at which the biologically effective dose (BED) is exactly 80.00 Gy, 60.00 Gy, and 48.00 Gy or more, respectively. The BED is based on the linear-quadratic formula with an alpha/beta ratio of 10 (BED10).
fr: fraction(s); BEDX: biologically effective dose based on the linear-quadratic formula with an alpha/beta ratio of X.
| Fraction(s) | 1 fr | 3 fr | 4 fr | 5 fr | 6 fr | 8 fr | 10 fr | |
| BED10 80 Gy | Physical dose (BED10) | 23.73 Gy (80.04 Gy) | 36.24 Gy (80.02 Gy) | 40.00 Gy (80.00 Gy) | 43.01 Gy (80.01 Gy) | 45.50 Gy (80.00 Gy) | 49.45 Gy (80.02 Gy) | 52.47 Gy (80.00 Gy) |
| BED10 60 Gy | Physical dose (BED10) | 20.00 Gy (60.00 Gy) | 30.00 Gy (60.00 Gy) | 32.92 Gy (60.01 Gy) | 35.21 Gy (60.00 Gy) | 37.08 Gy (60.00 Gy) | 40.00 Gy (60.00 Gy) | 42.20 Gy (60.01 Gy) |
| Relative dose* (%) | 84.3% | 82.8% | 82.3% | 81.9% | 81.5% | 80.9% | 80.4% | |
| BED2 | 220.00 Gy | 180.00 Gy | 168.39 Gy | 159.18 Gy | 151.66 Gy | 140.00 Gy | 131.24 Gy | |
| BED10 48 Gy | Physical dose (BED10) | 17.48 Gy (48.04 Gy) | 25.81 Gy (48.02 Gy) | 28.17 Gy (48.01 Gy) | 30.00 Gy (48.00 Gy) | 31.48 Gy (48.00 Gy) | 33.76 Gy (48.01 Gy) | 35.44 Gy (48.00 Gy) |
| Relative dose* (%) | 73.7% | 71.2% | 70.4% | 69.8% | 69.2% | 68.3% | 67.5% | |
| BED2 | 170.26 Gy | 136.84 Gy | 127.36 Gy | 120.00 Gy | 114.06 Gy | 104.99 Gy | 98.24 Gy |