Ronald A. Meyer1,2, Jill M. Slade2,
Robert W. Wiseman1,2
1Physiology, Michigan State University,
East Lansing, MI, United States; 2Radiology, Michigan State
University, East Lansing, MI, United States
Vascular
Space Occupancy (VASO) and VASO with Tissue suppression (VAST, or Gray Matter
Nulling, GMN) are fMRI methods which detect blood volume changes, and hence
are thought be more localized to gray matter than conventional BOLD fMRI.
However this study shows that at the typical spatial resolution of fMRI
studies, these methods are no better localized to gray matter voxels than
BOLD.