Percentage Errors in Estimation of Change in Ki Between 2 Successive PET/CT Scans When Using SKApub, SKAopt, or ESKA Ki Estimates
| Group | SKApub | SKAopt | ESKA |
| 20 s/55 m (n = 13) | −135.6* ± 181.3%† | 31.2% ± 131.5% | 0.7% ± 103.8% |
| 120 s/55 m (n = 31) | −123.5% ± 622.1% | −95.4% ± 535.1%† | −52.3% ± 212.0% |
↵* In 20-s/55-m group, SKApub was significantly different from 2 other approaches in terms of mean error. In 120-s/55-m group, mean error was only significantly different between SKApub and SKAopt (Wilcoxon test).
↵† In 20-s/55-m group, SKApub was significantly different from 2 other approaches in terms of associated variance. Also, variance of SKAopt was significantly different from that of SKApub and ESKA (Friedman test).
Data are mean ± SD.