The first 12 regressors are 1 and 2: fundamental real (cosine), fundamental imaginary (sine) 3 and 4: 1st harmonic real and imag 5 and 6: real and imag at a freq just below the fundamental 7 and 8: real and imag at a freq just above the fundamental 9 and 10: real and imag at a freq just below the 1st harmonic 11 and 12: real and imag at a freq just above the 1st harmonic
The rest are the betas are for nuisance variables doug On 06/25/2013 04:22 PM, dgw wrote: > Hi, > > I am examining the affect a metal artifact has on fMRI data, and I am > using Eccentricity mapping with the retinotopy analysis in FSFast. I > was recently asked to switch from examining the difference in the fsig > to examining the difference in the betas. I opened up beta.nii.gz and > I can see that it has a size of: > > 1 #of vertices 1 39 > > Can you explain to me, how I figure out where each of the 39 come from > (and possibly point me to which of these might be appropriate to > use?)? > > Thank You, > Dan > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
