Preprocessing quality control - sjgershm/ccnl-fmri GitHub Wiki

Once preprocessing is finished, you should run two checks for each participant individually.

First, look at the coregistration between the structural and mean functional images:

ccnl_check_registration(EXPT,subj)

Click on major landmarks (e.g., the ventricles) that are clearly visible in the functional image and make sure that the crosshairs are in the same anatomical location in both images. If they aren't, then something went wrong during preprocessing.

Second, look at the head motion time series:

ccnl_plot_movement(EXPT,subj)

If there are translations greater than 4mm, consider discarding the subject. You can ignore the jumps between runs (which are indicated by vertical dashed lines).