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help > RE: smoothed fmri data in roi-roi analyses
Feb 8, 2015 12:02 PM | Alfonso Nieto-Castanon - Boston University
RE: smoothed fmri data in roi-roi analyses
Dear Peter,
Yes, that sounds perfectly correct. The only thing to keep in mind is that, when extracting BOLD signals from ROIs, CONN is going to use by default the specification that you define in "Functional data for ROI-level BOLD signal extraction" field in Setup.Functionals. If you prefer to skip this behavior, and use instead the functional files defined in "Functional data for voxel-level BOLD signal extraction", then simply check in "Functional data for ROI-level BOLD signal extraction " field the "same files" option. Alternatively, you may select individually which functionals you wish to be used separately for each ROI by checking/unchecking the "Use ROI source data" box for each ROI in Setup.ROIs.
Hope this helps
Alfonso
Originally posted by Peter McColgan:
Yes, that sounds perfectly correct. The only thing to keep in mind is that, when extracting BOLD signals from ROIs, CONN is going to use by default the specification that you define in "Functional data for ROI-level BOLD signal extraction" field in Setup.Functionals. If you prefer to skip this behavior, and use instead the functional files defined in "Functional data for voxel-level BOLD signal extraction", then simply check in "Functional data for ROI-level BOLD signal extraction " field the "same files" option. Alternatively, you may select individually which functionals you wish to be used separately for each ROI by checking/unchecking the "Use ROI source data" box for each ROI in Setup.ROIs.
Hope this helps
Alfonso
Originally posted by Peter McColgan:
Dear Alfonso,
I am trying to run an roi-roi analyses (76 regions) using;
1) un-normalised using u- prefix fmri scans and s- prefix structural
2) normalised using w- prefix fmri scans and w- prefix structural
3) smoothed-normalised using s- prefix fmri scans and w- prefix structural
Is this correct, when i use s- prefix fmri scans, I get a message stating cannot find unsmoothed data?
I am doing this to investigate the differences these have on the fmri connectome.
Thanks for your help.
Peter
I am trying to run an roi-roi analyses (76 regions) using;
1) un-normalised using u- prefix fmri scans and s- prefix structural
2) normalised using w- prefix fmri scans and w- prefix structural
3) smoothed-normalised using s- prefix fmri scans and w- prefix structural
Is this correct, when i use s- prefix fmri scans, I get a message stating cannot find unsmoothed data?
I am doing this to investigate the differences these have on the fmri connectome.
Thanks for your help.
Peter
Threaded View
| Title | Author | Date |
|---|---|---|
| Peter McColgan | Jan 30, 2015 | |
| Alfonso Nieto-Castanon | Feb 8, 2015 | |
| Kaylah Curtis | Nov 11, 2016 | |
| Alfonso Nieto-Castanon | Nov 12, 2016 | |
| Larry Lai | Apr 1, 2018 | |
| Peter McColgan | Feb 13, 2015 | |
| Alfonso Nieto-Castanon | Feb 18, 2015 | |