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Segmentation of Activity Maps Improves Computational Efficiency
| Tallies | No. of histories* |
CPU time† (h) |
Tumor mean dose‡ (Gy) |
|---|---|---|---|
| 50,000 | 4,000,000 | 4,642.3 | 63.7 |
| 20 | 200,000 | 16.8 | 60.6 |
| 10 | 30,000 | 4.0 | 60.4 |
| 5 | 4,000 | 0.5 | 53.5 |
Photon transport for activity and density maps from SPECT/CT scan at 27 h.
CPU time is sum of all CPU time spent on each node of Beowulf cluster.
Absorbed doses to tumors are calculated using MTD of 27.25 Gy to normal lungs.
