On Fri, Jan 27, 2012 at 12:06 PM, Michael Harms
<mharms@conte.wustl.edu> wrote:
Hi guys,
We are currently trying to fix some errors in the white/pial surfaces
where there are thin white matter strands by using control points, and
are noticing a couple things:
1) The resulting WM surface in the area of the CPs can end up too far
into the GM instead. Given that, is there any practical guidance for
how to think about the surrounding spatial extent that is impacted by a
given CP? i.e., How do CP's actually get used within mri_normalize in
an algorithmic sense?
2) The surfaces are being impacted in places distant from the CPs.
e.g., CP's placed in the left anterior temporal lobe are resulting in
surface changes in the right anterior temporal lobe. And when I
difference the original norm.mgz vs. the one obtained after using CP's,
I'm seeing an odd pattern of intensity differences which is clearly not
limited to just the area of the CP's (which would be my expectation).
This is version 5.1.
thanks,
-MH
--
Michael Harms, Ph.D.
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Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
Renard Hospital, Room 6604 Tel: 314-747-6173
660 South Euclid Ave. Fax: 314-747-2182
St. Louis, MO 63110 Email: mharms@wustl.edu
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