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Computation time (s) per iteration for the regularization step in single and multiple GPU reconstructions.
| Protocol | Resolution | Single GPU | Multi-GPU | Speedup |
|---|---|---|---|---|
| Full-fan (121 projections) | 512 × 512 × 70 | 1.58 | 0.80 | 1.98 |
| 256 × 256 × 70 | 0.40 | 0.20 | 2.00 | |
| 128 × 128 × 70 | 0.10 | 0.06 | 1.67 | |
| Half-fan (164 projections) | 512 × 512 × 70 | 1.59 | 0.80 | 1.99 |
| 256 × 256 × 70 | 0.40 | 0.21 | 1.90 | |
| 128 × 128 × 70 | 0.10 | 0.06 | 1.67 |
