Thank you, Dr. Greve. Does -projfrac-max 0 1 register the maximal P value cross entire depth of cortex to the vertex on the surface? Does -projfrac-avg 0 1 delta register the average P value cross entire depth of cortex to the vertex on the surface? Can I use these flags in mris_preproc or mris_surf2surf during the surface-based group analysis? Xin
________________________________ From: Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu] Sent: Thu 3/5/2009 11:25 AM To: Wang, Xin Cc: freesurfer Subject: Re: [Freesurfer] How to project fMRI activity of entire depth of cortex on to surface Do any of the other --proj flags do what you need? Eg, --projfrac-max? See the --help doug Wang, Xin wrote: > Hello, Freesurfer group, > > The mri_vol2surf only register the fMRI activity at a certain depth of > cortex, as specisfied by -projecfrac, to the cortical > surface. mri_surf2surf does the same thing. I want to identify any > cortical region have activation during the task, therefore, I need to > project fMRI activity of entire depth of cortex onto surface. Some > regions may have activity in different depth of cortex, Ideally, the > significent level of these regions reflect the peak of the activity > cross entire depth or the sum of significense of entire depth. > > the --interp trilinear may do some toward my goal, but it elimit many > activities compare to nearest. > > Thanks, > > Xin Wang > ------------------------------------------------------------------------ > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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