A Rotational Cylindrical fMRI Phantom for Image Quality Control
Fig 5
An example of temporal changes in signal for EPI and GRE.
Signal changes from a single voxel located in the 1.6% agar wedge, during a simulated fMRI block experiment: A) EPI run with 60 scans, TE = 60 ms, with phantom rotation after every 15 scans. B) GRE run with 4 scans, TE = 30 ms, with one phantom rotation after the 2nd scan.