Biophysical modeling of phase changes in BOLD fMRI

  title={Biophysical modeling of phase changes in BOLD fMRI},
  author={Zhaomei Feng and Arvind Caprihan and Krastan B. Blagoev and Vince D. Calhoun},
  volume={47 2},
In BOLD fMRI, stimulus related phase changes have been repeatedly observed in humans. However, virtually all fMRI processing utilizes the magnitude information only, while ignoring the phase. This results in an unnecessary loss of physiological information and signal-to-noise efficiency. A widely held view is that the BOLD phase change is zero for a voxel containing randomly orientated blood vessels and that phase changes are only due to the presence of large vessels. Based on a previously… CONTINUE READING