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. 2012 Nov 5;7(11):e47443. doi: 10.1371/journal.pone.0047443

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© 2012 Mutch et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Mean percentage of ‘blue’ voxels for the CVR (0 to −0.56 BOLD units/mmHg CO₂) and DFA (0.5 to 0 Hurst exponent units) maps for the 8 patients with carotid steno-occlusive disease. All patients had square wave CO₂ stimuli. A significant difference in mean percentage of ‘blue’ voxels was seen between CVR and DFA for the end time period.