Patients with Both Helical and Cine CT PET
| PET/CT scan | Severity (% of maximum) | Size–severity (% <60% maximum) | % of LV <2.0 SD | % LV <2.5 SD | Transaxial misregistration (mm) | Mean Δ cine vs. helical (mm) | Diaphragm mm to CT 0 | Mean Δ mm diaphragm |
|---|---|---|---|---|---|---|---|---|
| All helical CT PET | 74.2 ± 7.3 | 8.5 ± 17.5 | 8.2 ± 5.8 | 6.1 ± 5.6 | 8.34 ± 6.51 | 4.4 | 5.2 ± 15.8 | 3.3 |
| All cine CT PET | 77.6 ± 6.2 | 4.5 ± 11.6 | 5.1 ± 5.1 | 3.5 ± 4.7 | 3.93 ± 3.50 | 2.0 ± 15.4 | ||
| n = 114, P for Δ | 0.0000 | 0.0024 | 0.0000 | 0.0000 | 0.0000 | 0.0002 | ||
| Helical CT PET with artifacts | 73.7 ± 7.3 | 7.5 ± 17.6 | 8.7 ± 5.4 | 6.3 ± 5.3 | 11.87 ± 5.89 | 7.2 | 5.3 ± 16.9 | 2.6 |
| Cine CT PET same patients | 79.2 ± 5.0 | 1.2 ± 3.3 | 3.9 ± 3.8 | 2.2 ± 3.0 | 4.69 ± 3.67 | 2.7 ± 16.2 | ||
| n = 67, P for Δ | 0.0000 | 0.0038 | 0.0000 | 0.0000 | 0.0000 | 0.0334 |
LV = left ventricle.
Quantitative measurements of defects are for quadrant containing misregistration artifactual defect or for worst quadrant in absence of misregistration artifact.