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Whole-brain data: (a) BHI expressed as temporal change in tCBF (left) and SSS flow velocity (right), based on phase-contrast flow velocity measurements. Subjects with OSA (red) had a significantly greater BHI derived from tCBF (79 vs. 60 mL/min2/100 g, P = 0.010) and from flow velocity (0.48 vs. 0.36 cm/s2, P = 0.014). (b) Neither the flow upscaling calibration factor nor the brain mass were significantly different between groups.
