Research Article

Effective Preprocessing Procedures Virtually Eliminate Distance-Dependent Motion Artifacts in Resting State FMRI

Figure 3

Group averaged power spectrum densities (PSD) of resting-state FMRI time series within brain tissues for each step in two different preprocessing orders. The improper processing order (pipeline 1) can reintroduce noise frequency components (signals of no interest) in lower frequency bands (  Hz, the green-tinted area) and higher frequency bands (see the text for more details).