Parameter | GE Healthcare | Siemens Healthcare | ||
---|---|---|---|---|
Discovery MI PET/CT 3 Rings | Discovery MI PET/CT 4 Rings | SIGNA PET/MR | Biograph mCT Flow PET/CT | |
Contrast Recovery [%] | ||||
10 mm–Radioactive | 44.2 | 53.7 | 48.7 | 28.5 |
13 mm–Radioactive | 53.4 | 64.0 | 62.9 | 42.3 |
17 mm–Radioactive | 66.4 | 73.1 | 68.1 | 58.4 |
22 mm–Radioactive | 70.7 | 82.7 | 76.1 | 70.7 |
28 mm–Non-Radioactive | 81.6 | 86.8 | 87.1 | 72.1 |
37 mm–Non-Radioactive | 84.5 | 90.7 | 92.7 | 78.3 |
Lung Error [%] | 7.8 | 4.4 | 1.6 | 5.6 |
Spatial Resolution FWHM* | Â | Â | Â | Â |
Radial, 1 cm | 4.65 | 4.10 | 4.46 | 4.33 |
Axial, 1 cm | 4.47 | 4.48 | 5.35 | 4.25 |
Tangential, 1 cm | 4.36 | 4.19 | 4.08 | 4.33 |
Radial, 10 cm | 5.54 | 5.47 | 5.81 | 5.16 |
Axial, 10 cm | 5.44 | 6.01 | 6.75 | 5.85 |
Tangential, 10 cm | 4.75 | 4.49 | 4.44 | 4.72 |
Radial, 20 cm | 7.41 | 7.53 | 8.42 | 5.55 |
Axial, 20 cm | 5.78 | 6.10 | 7.30 | 7.80 |
Tangential, 20 cm | 5.18 | 4.90 | 5.27 | 6.48 |
Sensitivity – Center of FOV |  |  |  |  |
(cps/kBq) | 7.26 | 13.7 | 22.9 | 9.60 |