the F6 atlas center is the actual AC of the averaged image. this is
actually ~1mm below the AC coordinate of the Martin-Bowden atlas, but
David made the judgement call to deviate slightly from that atlas in
the interest of anatomical accuracy. my recommendation is to align
the anatomical images with the macaqueF6 volume (part of the F6
download) using whichever affine transform you have available and
define the macaqueF6 AC coordinate as the center of your volume.
this way you may use the average F6 surface for your own data, and
the coordinates you read off of your own volume will directly match
the coordinates of the many atlases in the F6 dataset. i have also
heard talk of registering the saleem/logothetis atlas to the F6
atlas, which will then make that dataset also available to you.
please let me know if you have any more questions
________________________
gaurav patel
[EMAIL PROTECTED]
www.neurofreak.net
On Mar 28, 2007, at 8:42 AM, Donna Dierker wrote:
Hi Donald,
While I know Gaurav Patel is on caret-users, I'm not sure he always
reads the posts, so I'm explicitly copying him and changing the
subject line. There was a meeting at wustl.edu in July 2006, when
the MacaqueF6 was just evolving. Much discussion centered on where
the origin should be, and I think the ultimate decision was to
adopt a convention used in a related atlas -- perhaps the Martin-
Bowden atlas. There are several references to this atlas on pages
54-60 of this tutorial:
CARET_TUTORIAL_SEPT-06
http://sumsdb.wustl.edu/sums/directory.do?id=6585200
Gaurav can almost certainly provide a more helpful reply.
Donna
On 03/27/2007 04:12 PM, DG MCLAREN wrote:
Dear All,
The lab that I am currently working in is trying to decide the
best way to align to our macaque data. There are two approaches:
(1) Make the AC the origin; or (2) Make the Interaural/EarBarZero
point the origin. The latter would match up with the data provided
by the new Logothetis atlas; whereas the former would line up with
the CARET convention.
Any thoughts on which convention is better would be appreciated.
Best Regards, Donald McLaren
=====================
D.G. McLaren
University of Wisconsin - Madison
Neuroscience Training Program
Tel: (773) 406 2464
