Hi, i think I will (again) try to use caret for individual segmentation. While segmenting a full hemisphere works fine but is a lot of work, I sometimes would like to use occipital flattening only.
I cropped and segmented a right occ-lobe, the surface rendering tells me that there are no topological defects. When doing Surface->Flatten Partial Hemispheres (with y-ant padding) using the ellipsoid surface I get almost all of my flat surfaces covered red with crossovers. Even after turning of the coloring that part of the surfaces does not have any curvature marks, which I think I need for making the calcarine cut. (see attached image crossover_problem) Using the Flattening from the fiducual surface, I get no crossovers but a very "funny" form of the flat surface. (flat_from_fidicual.jpg) The same happens if I crop a bit more posterior. In that case I can use flattening using the ellipsoid but get large gray "rectangular forms" at the edges. So my questions are: a) in earlier versions I got a more or less round flat surface in which I just applied cut through the calcarine as described in Tutorial 3-06 Part II pp 7, and in the manual to caret 5.1. Has that procedure changed. Is there some new documentation I missed? b) if not, is there any easy way to describe how I should do the partial flattening now. c) is it better to fill the cut-through ventricals or leave them as "holes"? Any tip is very appreciated, Thanks in advance, Roland -- Dr. Roland Marcus Rutschmann <[EMAIL PROTECTED]> Institute for Experimental Psychology, University of Regensburg Universitätsstraße 31, 93053 Regensburg, Germany Tel: +49 941 943 2533, Fax: +49 941 943 3233 http://www.psychologie.uni-regensburg.de/Rutschmann
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