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Fig 1. A, sagittal orientation image illustrating the planning of the imaging section (1) and the arterial spin-labeling slab (2) parallel to the orbitomeatal angle. B, regions of interest used for quantification of the hemodynamic parameters. In each hemisphere, 2 regions of interests were drawn in the frontal lobe, and 1, in the frontal parietal, parietal occipital, and occipital regions.
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