Dear Stephen:
One more question. After skull stripping by BET, I usually extract the 7th volume of my resting-state recordings (200 time points in total) by fslroi for further linear and nonlinear registration. However, using both flags (-R and -F) of BET, I cannot extract one specific volume by fslroi. Previously I used only -F flag of BET and fslroi worked. Why?
It seemed "bet <input data> -F -R" yielded a "concatenated" single volume rather than a time series with separate volumes, as I checked the BET results by fslview. Should I use the flag -f instead and find tune the f value to get the best BET results (for the sake of fslroi use) ?
Best,
Edward