Table 4.
Reconstruction and inference times.
| Reconstruction time [s] | |||
|---|---|---|---|
| 2D | CPU | Zero-filling | 2.2 |
| View-sharing | 5.8 | ||
| GPU | Zero-filling | 0.6 | |
| View-sharing | 4 | ||
| 3D | CPU | Zero-filling | 250 |
| View-sharing | 423 | ||
| GPU | Zero-filling | 160 | |
| View-sharing | 357 | ||
| Inference time [s] | |||
|---|---|---|---|
| 2D | CPU | Dictionary | 9.5 |
| Group matching | 0.6 | ||
| Neural network | 0.1 | ||
| GPU | Dictionary | 6.6 | |
| Group matching | 0.5 | ||
| Neural network | < 0.1 | ||
| 3D | CPU | Dictionary | 618 |
| Group matching | 90 | ||
| Neural network | 10 | ||
| GPU | Dictionary | 115 | |
| Group matching | 68 | ||
| Neural network | 10 | ||
Measurements were performed on an Intel Xeon processor E5-2600 v4 (48 CPU cores) equipped with a NVIDIA Tesla K80 GPU. The inference times are compared between exhaustive grid search (dictionary matching), fast group matching, and neural network. 2D results are reported for a single slice of the spiral trajectory.