Half-Life (t1/2) with 95% Confidence Interval (CI) and Tumor-to-Background Contrast Ratios for All Experiments Using Both High-Energy and Medium-Energy Collimators
| Experiment 1 | Experiment 2 | Experiment 3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Acquisition speed (cm/min) | Collimator type | t1/2 (d) | 95% CI (d) | Contrast ± 1σ | t1/2 (d) | 95% CI (d) | Contrast ± 1σ | t1/2 (d) | 95% CI (d) | Contrast ± 1σ |
| 20 | High-energy | 8.3 | 8.1, 8.6 | 6.6 ± 0.7 | 7.9 | 7.6, 8.2 | 7.5 ± 0.7 | 8.4 | 7.8, 9.2 | 3.9 ± 0.5 |
| Medium-energy | 8.5 | 8.2, 8.7 | 2.5 ± 0.1* | 7.8 | 7.5, 8.1 | 3.0 ± 0.1* | 8.6 | 8.0, 9.2 | 2.4 ± 0.3* | |
| 100 | High-energy | 8.4 | 8.0, 8.8 | 6.6 ± 0.3 | 8.0 | 7.7, 8.4 | 6.8 ± 0.4 | 8.4 | 7.6, 9.2 | 4.0 ± 0.5 |
| Medium-energy | 8.5 | 8.2, 8.8 | 2.6 ± 0.2* | 7.9 | 7.6, 8.1 | 3.0 ± 0.1* | 8.5 | 8.0, 9.0 | 2.3 ± 0.2* | |
↵* P < 0.01, compared with high-energy collimators at same speed.