Cerebral Blood Flow Measurement Using fMRI and PET: A Cross-Validation Study
Figure 5
FMRI (top) and PET (bottom) CBF percent
changes during visual stimulation in the V1, t-map, and GM ROIs. Error bars represent the standard deviation in
the data. Experimental conditions 1 to 5: baseline, 25%, 50%, 75%, and 100%
intensity checkerboard visual stimulation. The FAIR CBF maps have considerably
higher SNRs than PET maps, and there was a consistent monotonic increase in the
CBF percent change (ΔCBF) with stimulus intensity in the FAIR data
which could not be discerned distinctively in PET given the limited SNR.
