]>Cerebral Blood Flow Measurement Using fMRI and PET: A Cross-Validation Study : Table 2
Table 2: FAIR and PET CBF percent changes averaged over all subjects (mean ±std), for all conditions (baseline, 4 levels of visual checkboard (CHB) stimulation, and hypercapnia (HC)), in the V1, t-map, and GM ROIs. For PET, the baseline percent change was fixed at 0%, since only one baseline volume was acquired.
Baseline 25% CHB 50% CHB 75% CHB 100% CHB 5% HC
ΔCBF (%)
ROI: retinotopically defined VI (mean ± std)
FAIR 0 . 6 ± 2 . 6 1 1 . 3 ± 5 . 7 1 5 . 0 ± 8 . 1 1 7 . 5 ± 9 . 4 2 2 . 5 ± 1 1 . 2 8 . 3 ± 6 . 2
PET 0 . 0 ± 0 . 0 2 7 . 6 ± 2 7 . 9 2 7 . 5 ± 3 5 . 3 1 6 . 3 ± 2 5 . 0 2 6 . 9 ± 3 0 . 0 8 . 1 ± 1 9 . 6
ROI: PET and FAIR t-map overlap (mean ± std)
FAIR 1 . 1 ± 2 . 7 1 4 . 0 ± 8 . 7 2 0 . 1 ± 8 . 3 2 3 . 5 ± 9 . 1 2 9 . 1 ± 8 . 8 1 0 . 5 ± 7 . 1
PET 0 . 0 ± 0 . 0 3 5 . 2 ± 1 8 . 2 3 8 . 4 ± 2 5 . 5 2 7 . 7 ± 2 2 . 1 4 1 . 6 ± 1 8 . 3 1 5 . 7 ± 1 8 . 0
ROI: occipital lobe grey matter (mean ± std)
FAIR 0 . 9 ± 3 . 0 6 . 1 ± 4 . 4 8 . 6 ± 4 . 0 9 . 5 ± 4 . 9 1 2 . 8 ± 5 . 1 7 . 9 ± 6 . 2
PET 0 . 0 ± 0 . 0 1 5 . 0 ± 1 7 . 8 1 5 . 7 ± 2 8 . 2 7 . 3 ± 1 8 . 3 1 6 . 0 ± 2 3 . 2 9 . 7 ± 2 3 . 0