Global CBF Measured by PET-Only and MRI-Reference Approach and Regional CBF Regression Parameters at Each PaCO2 Level
| Condition | MRI-reference CBF (mL/100 g/min) | PET-only CBF (mL/100 g/min) | Slope | Intercept (mL/100 g/min) | R2 |
| Hypocapnia | 36.5 ± 6.6 | 34.3 ± 6.0 | 1.14 ± 0.18 | −4.9 ± 2.4* | 0.98 ± 0.01 |
| Normocapnia | 54.3 ± 6.6 | 57.5 ± 10.0 | 1.14 ± 0.28 | −9.3 ± 8.7 | 0.97 ± 0.02 |
| Hypercapnia | 92.3 ± 8.4 | 87.4 ± 10.6 | 1.28 ± 0.22 | −43.5 ± 20.4* | 0.96 ± 0.02 |
↵* Significantly different from zero (no slopes were significantly different from one).