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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Neuroimage. 2011 Jun 17;58(1):168–176. doi: 10.1016/j.neuroimage.2011.06.010

FIG. 6. Spatial specificity and homogeneity indices of four phase cycled bSSFP fMRI maps.

FIG. 6

(a) Spatial specificity index determined as ratio of total fMRI sensitivities between tissue regions (Tissue) and cortical surface regions (Surf.) (TNtissue/TNsurf). (b) Homogeneity index determined as standard deviations divided by mean T values within the middle cortical ROI. The data are displayed for bSSFP fMRI maps with phase cycling (PC) angles of 0° (PC0), 90° (PC0), 180° (PC2), and 270° (PC3) and with TR = 10 ms and 20 ms, in comparison with GRE fMRI map. ‘*’ represents statistically significant difference (p < 0.05).