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a) Spatial agreement between the vascular reactivity map using BHCO2 method and RestingCO2 method. As a comparison, agreement is also plotted between the maps using BHCO2 and the maps obtained with the BHBlock design and BHSine−cosine regressor. b) Comparison of spatial ICCs of vascular reactivity maps obtained with the six methods. ICCs were calculated over voxels in grey matter only.
