Patients with Cine CT PET Having Worse Misregistration Artifactual Defects than with Helical CT PET Corrected by Shifting Cine CT Data
| Cine CT PET worse than helical CT (8 patients) | Severity (minimum quadrant average) | Size–severity (% <60% maximum) | Size (% ≤2.5 SD) | Transaxial misregistration (mm) |
|---|---|---|---|---|
| Helical CT PET | 74.79 ± 3.60 | 1.72 ± 2.58 | 5.26 ± 4.49 | 8.39 ± 3.00 |
| Cine CT PET | 71.28 ± 5.45 | 9.64 ± 10.27 | 10.08 ± 5.57 | 12.44 ± 5.51 |
| n = 8, P for Δ | 0.0216 | 0.0284 | 0.0018 | 0.0751 |
| Cine CT PET | 70.29 ± 5.07 | 11.01 ± 10.27 | 10.88 ± 5.49 | 12.24 ± 5.93 |
| Shifted cine CT PET | 75.98 ± 6.10 | 4.05 ± 6.60 | 4.98 ± 5.77 | 2.71 ± 3.39 |
| n = 7*, P for Δ | 0.0043 | 0.0639 | 0.0047 | 0.0008 |
↵* Quantitative shifted cine CT data were lost for 1 patient due to corruption of the header but with good saved images.