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. Author manuscript; available in PMC: 2008 Jul 15.
Published in final edited form as: Neuroimage. 2007 Mar 12;36(4):1110–1122. doi: 10.1016/j.neuroimage.2006.12.034

Table 1.

Methods for choosing a Region of Interest (ROI) for averaging

ROI Description Number of Voxels*
V1 Primary visual cortex, defined retinotopically in a separate scan session 59 ± 19
PICORE – BOLD (r = 0.5) voxels exceeding r = 0.5 in BOLD activation from a separate PICORE run 174 ± 80
PICORE – CBF (r = 0.4) voxels exceeding r = 0.4 in CBF activation from a separate PICORE run 174 ± 69
PICORE – CBF (r = 0.5) voxels exceeding r = 0.5 in CBF activation from a separate PICORE run 93 ± 46
PICORE – CBF (r = 0.6) voxels exceeding r = 0.6 in CBF activation from a separate PICORE run 53 ± 36
QUIPSS II – CBF (r = 0.5) voxels exceeding r = 0.5 in CBF from the averaged QUIPSS II data itself 106 ± 108
*

Reported as the mean ± standard deviation across subjects