Re: [Freesurfer] more on fieldsign problems-

2011-07-07 Thread Bruce Fischl
are you sure it's registered well to the anatomical/surface? On Thu, 7 Jul 2011, Michelle Umali wrote: > Hi Doug, > The eccen and polar maps look ok, although activation tends to be > limited to the occipital poles and lateral surface not really along > the calcarine. > > Is it possible to find o

Re: [Freesurfer] more on fieldsign problems-

2011-07-07 Thread Michelle Umali
Hi Doug, The eccen and polar maps look ok, although activation tends to be limited to the occipital poles and lateral surface not really along the calcarine. Is it possible to find out how the colors in the eccen and polar images correspond to positions in the stimulus using rtview? There's

Re: [Freesurfer] more on fieldsign problems-

2011-07-07 Thread Douglas N Greve
Hi Michelle, do the eccen and polar maps look ok? Also, I would probably smooth them a little bit. The field sign calculation is basically a spatial derivative so it can be sensitive to noise. doug Michelle Umali wrote: > Dear all, > I've been having issues with my fieldsign images all I g

[Freesurfer] more on fieldsign problems-

2011-07-06 Thread Michelle Umali
Dear all, I've been having issues with my fieldsign images all I get are speckles. I did the following and did not get any errors: 1) ran recon-all -all 2) cut and saved occipital patches (rh.occip.patch.3d) from inflated surface 3) ran mris_flatten -w 0 distances 20 7 rh.occip.patch.3d