Dear Darren,
check out the code of spm_xbrain.
Find the line containing "isosurface". This function allows you to
triangulate any volume at a given threshold (0.5) in Matlab >= version 5.3.
All you have to do is segment the brain, and write a routine that reads
analyze images into a 3D data array (spm_read_vols) and then use isosurface
as above.
I hope this helps.
-Christian
Dr. Christian Büchel
Neurologische Universitätsklinik, Haus B
Universitäts-Krankenhaus Eppendorf
Martinistr. 52
D-20246 Hamburg
Germany
Tel.: +49-40-42803-4726 Fax.: +49-40-42803-9955
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www.uke.uni-hamburg.de/kliniken/neurologie/pages/mitarbeiter/buechel_c.htm
----- Original Message -----
From: "Darren Weber" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, February 27, 2002 11:21 PM
Subject: tissue surface extraction
Hi,
can anyone advise how to get the vertices of the white matter, grey matter,
inner skull, and scalp tissue *surfaces* from SPM? I assume that are not
routinely available now, but I wonder what routines in SPM would currently
contain relevant methods/values?
Cheers, Darren
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