Imaging System (PCS) Protocol Parameter Ranks with Regard to Average Absolute COV for 4 Largest Spheres (S37–S17)
| PET/CT system | Algorithm | S37 COV | S28 COV | S22 COV | S17 COV |
| PCS13 | VUE Point HD | 1.17 | 1.17 | 1.16 | 1.16 |
| PCS11 | VUE Point FX | 1.19 | 1.17 | 1.18 | 1.15 |
| PCS5 | TrueX | 1.18 | 1.18 | 1.16 | 1.18 |
| PCS6 | TrueX | 1.2 | 1.18 | 1.2 | 1.17 |
| PCS7 | TrueX | 1.18 | 1.2 | 1.2 | 1.22 |
| PCS8 | TrueX | 1.2 | 1.2 | 1.19 | 1.23 |
| PCS9 | TrueX (HD PET) | 1.85 | 1.17 | 1.2 | 1.2 |
| PCS1 | Blob-OS-TF | 1.22 | 1.21 | 1.23 | 1.21 |
| PCS4 | LOR-RAMLA | 1.23 | 1.24 | 1.23 | 1.22 |
| PCS2 | OSEM | 1.22 | 1.23 | 1.25 | 1.23 |
| PCS12 | VUE Point FX | 1.23 | 1.25 | 1.24 | 1.23 |
| PCS3 | OSEM | 1.27 | 1.26 | 1.25 | 1.23 |
| PCS10 | VUE Point | 1.25 | 1.27 | 1.26 | 1.26 |
Blob-OS-TF = Blob-basis function ordered-subsets time of flight; LOR-RAMLA = line-of-response–based row-action-maximum-likelihood algorithm; OSEM = ordered-subset expectation maximization.
Smaller ranks correspond to low COV variances in given sphere volume across each of 37 features and their 12 feature extraction configurations (C).