Errors Associated with Time Corrections
| High-definition | Attenuation-weighted OSEM | |||
| Time | Reference point method | No correction | Reference point method | No correction |
| ∼60 to 80 min | 1.2% | −9.2 | 1.8% | −6.0% |
| ∼80 to 60 min | −0.3% | 11.2% | −0.9% | 7.7% |
| Overall |%error| | 7.7% (10.8%*) | 12.7% | 4.5% (7.7%*) | 7.3% |
Percentage errors when using reference point method vs. no time correction. All differences were statistically significant at P ≤ 0.01 (Wilcoxon signed rank test).
↵* Outer borders of 90% confidence interval for |%error| regarding uncertainty of coordinates of reference point. This border and associated |%errors| were determined using tref ± 2 SEMs and SUVref ± 2 SEMs instead of tref and SUVref for time corrections (Table 1 presents the SEMs).