Table 2.
Quantitative recovery in PET scans containing MR coils.
| Scan #. Description | VOI mean (kBq∕ml) | VOI StDev∕mean(%) | True Act. Conc. (kBq∕ml) | %difference(VOI-true)∕true |
|---|---|---|---|---|
| Scan 1: Head coil in PET and CT (CT-AC) | 3.14 | 4.2 | 2.45 | +28.1% |
| Scan 2: Head coil in PET only (MR-AC) | 2.75 | 4.2 | 3.38 | −18.6% |
| Scan 3: Coil not present (reference scan) | 3.14 | 3.0 | 3.04 | +3.3% |
| Torso, both coil components (CT-AC) | 4.4 | 11.4 | 5.46 | −19.4% |
| Torso, bottom coil component (CT-AC) | 3.8 | 10.5 | 4.84 | −21.5% |
| Torso, no coil (reference scan) | 3.3 | 14.7a | 3.05 | +8.2 |
a
Shorter acquisition time (10 vs 15 min.) and lower activity relative to scans with coil components.