That converts from MNI305 to MNI152 without going through the talairach
itself. When FS computes Tal coords, it does so nonlinearly.
doug
On 9/11/13 12:08 PM, Yang, Daniel wrote:
Hi Doug,
It's pretty awesome. So accordingly,
MNI152x = (0.9975) MNI305x + (-0.0073) MNI305y + (0.0176) MNI305z +
(-0.0429) * 1
MNI152y = (0.0146) MNI305x + (1.0009) MNI305y + (-0.0024) MNI305z +
(1.5496) * 1
MNI152z = (-0.0130) MNI305 + (-0.0093) MNI305y + (0.9971) MNI305z +
(1.1840) * 1
The last row of the M (i.e., [-0.0429 1.5496 1.1840]') looks like some
sort of offset to me, correct?
In other words, we are obtaining MNI305 first, Freesurfer convert that
to TAL by default (question: is it done linearly or non-linearly?),
and then we can manually convert it to MNI152 also.
Thanks so much!
Daniel
--
Yung-Jui "Daniel" Yang, PhD
Postdoctoral Researcher
Yale Child Study Center
New Haven, CT
(203) 737-5454
On 9/10/13 6:52 PM, "Douglas N Greve" <gr...@nmr.mgh.harvard.edu
<mailto:gr...@nmr.mgh.harvard.edu>> wrote:
Hi Yang, I've computed a matrix that should do the trick. If you
are in
matlab, then
M = [ 0.9975 -0.0073 0.0176 -0.0429
0.0146 1.0009 -0.0024 1.5496
-0.0130 -0.0093 0.9971 1.1840
0 0 0 1.0000]
P305 = [MNI305x MNI305y MNI305z 1]';
P152 = M*P305
Can you give this a shot and see if it makes sense? It will
probably be
hard to tell since the matrix is pretty close to identity.
doug
On 09/10/2013 05:17 PM, Yang, Daniel wrote:
Thanks, Doug. I am really hoping to get MNI152 (because I also
use
fsl). Are MNI305 and MNI152 the same? How can I obtain MNI152
coordinates?
Best,
Daniel
--
Yung-Jui "Daniel" Yang, PhD
Postdoctoral Researcher
Yale Child Study Center
New Haven, CT
(203) 737-5454
On 9/10/13 5:14 PM, "Douglas N Greve"
<gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>
<mailto:gr...@nmr.mgh.harvard.edu>
<mailto:gr...@nmr.mgh.harvard.edu%3E>> wrote:
It is an estimate of Tal coords from the MNI305. See
http://imaging.mrc-cbu.cam.ac.uk/imaging/MniTalairach
If you want MNI305, run mri_surfcluster with --nofixmni
doug
On 09/10/2013 05:08 PM, Yang, Daniel wrote:
Hi all,
The output of mri_surfcluster --sum shows TalX TalY
TalZ. I am
wondering if they are based on the Talairach system
or some
sort of
MNI-Talairach system. If the latter, can you tell me
something
more
about it? Like a webpage that describes its relationship
between the
MNI152 or the Talairach system?
I find it confusing because mri_surfcluster said: "INFO:
fixing MNI
talairach coordinates"
Thanks!
Daniel
--
Yung-Jui "Daniel" Yang, PhD
Postdoctoral Researcher
Yale Child Study Center
New Haven, CT
(203) 737-5454
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