Table 3.
Computation cost of each kernel in forward and backward projectors (unit in millisecond).
| Forward pipeline (ms) | Image maker | Forward projection (SpMV) | Sinogram maker |
|---|---|---|---|
| 2.2 | 1668.0/1897.7 (with/w.o texture memory) | 17.3 | |
| Backward pipeline (ms) | Sinogram maker | Backward projection (SpMV) | Image maker |
| 15.4 | 1431.2/2989.2 (with/w.o texture memory) | 5.7 |