Tumor VOI Counts for 3.63-cm-Radius Sphere at Different Locations and Different RORs
| Tumor location | ROR (cm) | VOI counts* | |||
|---|---|---|---|---|---|
| b = 0 | b = 1/8 | b = 1/5 | b = 1/3 | ||
| Center | 26 | 541.2 (0) | 547.2 (0) | 548.5 (0) | 551.4 (0) |
| Off-axis 1 | 26 | 550.4 (1.7) | 560.1 (2.4) | 562.8 (2.6) | 568 (3) |
| Off-axis 2 | 26 | 542.1 (0.2) | 553.9 (1.2) | 558.3 (1.8) | 566.5 (2.7) |
| Center | 26 | 541.2 (0) | |||
| Center | 22 | 568.2 (5) | |||
| Center | 30 | 512.6 (−5.3) | |||
↵* Values in parentheses are percentage differences from central sphere counts.