Reconstruction Parameters for Each Camera
| Parameter | Advance | HR+ | HR961 | C-PET | IRIX | MCD | AXIS |
|---|---|---|---|---|---|---|---|
| Prj. matrix | 283×35×336 | 288×63×144 | 196×47×336 | 128×64×96×7 tilts | 128×83×90 | 128×96×96 | 128×83×90 |
| Algorithm | OSEM | OSEM | OSEM | FORE > RAMLA | OSEM | OSEM | OSEM |
| Recon. | 2 iterations | 2 iterations | 6 iterations | 1 iteration | 4 iterations | 2 iterations | 4 iterations |
| Parameters | 28 subsets | 8 subsets | 16 subsets | λ = 0.1 | 15 subsets | 8 subsets | 15 subsets |
| Randoms correction | Delays | Delays | Delays | Background subtraction | No | Background subtraction | No |
| Attenuation correction | Segmented | Segmented | Segmented | Segmented | Yes | Segmented | No |
| Scatter correction | Deconvolution | Deconvolution | Deconvolution | Background subtraction | No | Background subtraction | No |
| Postfilter | 8-mm gaussian | 8-mm gaussian | 8-mm gaussian | None | 6-mm gaussian | Weiner 0.67 | Butterworth 10, 0.30/cm |
| Voxel width (mm) | 4.30 | 5.1 | 4.53 | 4.0 | 4.67 | 4.0 | 4.67 |
| Slice thickness (mm) | 4.25 | 5.1 | 3.13 | 4.0 | 4.67 | 4.0 | 4.67 |
Prj. = projection; OSEM = ordered-subsets expectation maximization; FORE = Fourier rebinning; RAMLA = row action maximum likelihood algorithm; Recon. = reconstruction.