Regression Analysis of 18F-FDG Uptake Rates (Ki) for Model-Adjusted Input Functions and for Raw Image–Derived Input Functions in Comparison to Manual Blood Sampling (Figs. 7A and 7C)
| Input function | ROI | Slope of regression line | y-Intercept of regression line | R2 |
|---|---|---|---|---|
| Model-adjusted | RH cavities | 0.979 | 0.065 | 0.994 |
| LH cavities | 1.003 | −0.035 | 0.993 | |
| Descending aorta | 1.006 | 0.080 | 0.994 | |
| Raw image–derived | RH cavities | 0.839 | −0.194 | 0.782 |
| LH cavities | 0.806 | −0.468 | 0.945 | |
| Descending aorta | 0.712 | 0.636 | 0.837 |
R2 = coefficient of determination.