Tdimplant(Gy) α/β ratio for different values of RBE for I-125 implant
180 1.02 0.67 0.38
170 1.15 0.75 0.41
160 1.31 0.84 0.46
145 1.51 0.95 0.51
140 1.63 1.01 0.54
135 1.77 1.08 0.57
130 1.93 1.16 0.60
125 2.13 1.25 0.64
120 2.36 1.36 0.68
115 2.64 1.48 0.73
110 2.99 1.62 0.78
109 3.43 1.79 0.85
105 3.54 1.83 0.86
102 4.02 1.99 0.92
100 4.47 2.13 0.96
Table 1: Dependence of the α/β ratio on different RBE values using 125I. given in 2 Gy daily dose fractions.