Here we describe subsequent work by the Human Connectome Project (HCP), taking the initial advancements obtained at 3 T and pushing spatial resolution even further at ultrahigh field strengths. To assess the impact of spatial resolution on the resultant detectability of resting state networks throughout the brain, we compare 7 T data acquired at various isotropic spatial resolutions (2 mm, 1.6 mm, 1.5 mm, 1.25 mm, and 0.9 mm) using the 2 mm 3 T HCP rfMRI data as baseline. 7 T functional networks show enhanced BOLD CNR, resulting in sharper, stronger, and more well defined spatial detail even at the group level.
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