I THINK your last timepoint shld be 17.5 which covers from 17.5 - 20 and makes the timewindow 25 sec. so, yu will have 10 timepoints in total. Balaji

Cameron Ellis

Hi, I am running roisummary with an FIR analysis with a 25s timewindow, 5s prestim and TR=2.5s. I In the summary output I receive 10 nestpercond but shouldn't I receive 11 with these parameters?

timecourse: -5.0 -2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 timepoint: 0 1 2 3 4 5 6 7 8 9 10

I did not mask the roi. If I should only receive 10 nestpercond which timepoint is left out? Thanks in advance. Cameron _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

----------------------- Balaji M Lakshmanan M.S. Research Technologist Mass. General Hospital (East) e-mail: balaji@nmr.mgh.harvard.edu Phone: 617-726-9189