Difference between time series extracted by "Functional Connectivity" analysis and "Extract ROI Time Courses"

In DPARSF, "Extract ROI time courses" can extract the ROI time courses from the defined ROIs, as stored in: ROISignals in {WorkingDir}/Results/ROISignals_FunImgARCWF/ROISignals_Sub_001.mat

"Functional Connectivity" analysis can also extract the ROI time courses, as stored in: SeedSeries in {WorkingDir}/Results/FC_FunImgARCWF/ROI_FCMap_Sub_001.mat

In some cases, the variables in ROISignals and SeedSeries can be different.

This is because "Functional Connectivity" analysis is always restricted in the defined mask, e.g., Default mask (BrainMask_05_61x73x61.img).

If the ROI is at the edge of the brain, then ROISignals is the signal within that ROI, but SeedSeries is the signal from the intersection of the ROI and the mask.