System | Algorithm | PSF | TOF | Iterations | Subsets | Filter | FWHM | Voxel size (mm) | Time/bed position (min) | BckVar (%) |
PCS1 | Blob-OS-TF | NA | Yes | NA | NA | Un | NA | 4.00 | 1:15 | 2.80 |
PCS2 | OSEM | No | No | 4 | 8 | Ga | 5 | 4.06 | 3:00 | 2.50 |
PCS3 | OSEM | No | No | 2 | 8 | Ga | 5 | 5.31 | 2:00 | 2.97 |
PCS4 | LOR-RAMLA | No | No | NA | NA | Un | NA | 4.00 | 1:30 | 4.51 |
PCS5 | TrueX | Yes | No | 3 | 21 | Ga | 2 | 4.07 | 2:00 | 2.72 |
PCS6 | TrueX | Yes | No | 4 | 21 | None | NA | 4.07 | 3:00 | 3.19 |
PCS7 | TrueX | Yes | No | 4 | 21 | None | NA | 4.06 | 3:00 | 3.21 |
PCS8 | TrueX | Yes | No | 3 | 21 | Ga | 2 | 4.07 | 2:00 | 3.22 |
PCS9 | TrueX (HD PET) | Yes | No | 3 | 21 | Ga | 2 | 3.18 | 2:00 | 3.07 |
PCS10 | VUE Point | No | No | 2 | 21 | Ga | 6 | 5.47 | 2:00 | 7.30 |
PCS11 | VUE Point FX | Yes | Yes | 4 | 18 | Ga | 4 | 3.27 | 2:00 | 2.65 |
PCS12 | VUE Point FX | No | Yes | 2 | 32 | Ga | 6.4 | 5.47 | 2:00 | 2.51 |
PCS13 | VUE Point HD | Yes | No | 2 | 24 | Ga | 4 | 2.73 | 3:00 | 2.81 |
PSF = point spread function; TOF = time-of-flight; FWHM = full-width at half-maximum; BckVar (%) = background variability calculated according to NEMA NU2-2012; Blob-OS-TF = Blob-basis function ordered-subsets time of flight; NA = not applicable; OSEM = ordered-subset expectation maximization; Un = unknown; LOR-RAMLA = line-of-response–based row-action-maximum-likelihood algorithm; Ga = gaussian.
All imaging systems operated with uniform voxel sizes.