Wang, Xin wrote:
> 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?
yes
>
> Does _-projfrac-avg 0 1 delta_ register the average P value cross
> entire depth of cortex to the vertex on the surface?
yes, but probably not what you want to do.
>
> Can I use these flags in mris_preproc or mris_surf2surf during the
> surface-based group analysis?
No, but I can add it.
>
> Xin
> ------------------------------------------------------------------------
> *From:* Douglas N Greve [mailto:greve@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
> > ------------------------------------------------------------------------
> >
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