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Measured time at critical stage for invariant and variant1 cases with GPU in DIRECT TOF PET (20 iterations)
| [min:sec] | Forward-projection (GPU) | Discrepancy (CPU) | Back-projection (GPU) | Update (CPU) | Total | ||||
|---|---|---|---|---|---|---|---|---|---|
| H2D | FP | D2H | H2D | BP | D2H | ||||
| invariant | 0:7.53 | 1:45.27 | 0:2.85 | 0:0.32 | 0:7.59 | 1:43.18 | 0:2.85 | 0:12.59 | 5:11.97 |
| variant1 | 0:7.55 | 2:52.88 | 0:2.86 | 0:0.32 | 0:7.59 | 2:49.81 | 0:2.85 | 0:12.58 | 7:26.21 |
Note) H2D: data transfer from CPU to GPU, D2H: data transfer from GPU to CPU
