TABLE 1

Absorbed Fraction of Uniformly Distributed 131I Source in Various Sizes of Spheres Filled with Water as Medium

Sphere R (cm)131I β*Voxel sphere*Ref. A†Sphere R (cm)131I γ‡Voxel sphere‡Ref. B§
0.10.71—‖0.731.00.0250.0280.025
0.20.850.87N/A2.00.0490.0480.049
0.250.880.900.894.00.0990.1010.099
0.50.940.960.946.00.1490.1490.151
1.00.970.980.978.00.1970.1970.197
2.00.990.980.9810.00.2440.2440.244
12.00.2870.2880.288
14.00.3290.3280.329

  • ↵* NPS = 10,000; relative errors < 10%.

  • ↵† Akabani et al. (32).

  • ↵‡ NPS = 50,000; relative errors < 10%.

  • ↵§ Furhang et al. (33).

  • ↵‖ Sphere with 0.1-cm radius is below resolution of (0.4 cm)3 voxel.

  • NPS = number of histories; N/A = not applicable.