Dear Saad,
Thanks a lot for your reply. However, I haven't understood how can the waytotal be different for different subjects? To my knowledge, it just depends on the parameters built up (i.e. waytotal = total number sent - excluded streamlines, https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=FSL;808dbdf3.0903).
Thus, I want to compare the mean intensity within a ROI, so I set the same parameters for each subjects. But now, the waytotal numbers are all differents, can I continue my method of comparison or I should normalize these results with waytotal number?
Thanks so much for your help,
Kim
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