The 4th handles any translation. The 3x3 handles rotation and any scale.
On 9/11/13 10:21 AM, Garikoitz Lerma-Usabiaga wrote:
Hi Doug,
just a very naive question about coordinate change: why do we need the
fourth component? I mean, shouldn't be the transformation matrix 3x3
instead of 4x4 for a coordinate change in 3D space?
thanks!
Gari
On Wed, Sep 11, 2013 at 12:52 AM, 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>>> 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
>
>
> _______________________________________________
> Freesurfer mailing list
> Freesurfer@nmr.mgh.harvard.edu
<mailto:Freesurfer@nmr.mgh.harvard.edu>
> <mailto:Freesurfer@nmr.mgh.harvard.edu
<mailto:Freesurfer@nmr.mgh.harvard.edu>>
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
>
>
> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>
<mailto:gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>>
> Phone Number: 617-724-2358
> Fax: 617-726-7422
>
> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
<http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
> FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2
> www.nmr.mgh.harvard.edu/facility/filedrop/index.html
<http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
> Outgoing:
> ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
>
> _______________________________________________
> Freesurfer mailing list
> Freesurfer@nmr.mgh.harvard.edu
<mailto:Freesurfer@nmr.mgh.harvard.edu>
<mailto:Freesurfer@nmr.mgh.harvard.edu
<mailto:Freesurfer@nmr.mgh.harvard.edu>>
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
>
>
> The information in this e-mail is intended only for the
person to
> whom it is
> addressed. If you believe this e-mail was sent to you in
error and
> the e-mail
> contains patient information, please contact the Partners
> Compliance HelpLine at
> http://www.partners.org/complianceline . If the e-mail was sent to
> you in error
> but does not contain patient information, please contact the
> sender and properly
> dispose of the e-mail.
>
>
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu <mailto:gr...@nmr.mgh.harvard.edu>
Phone Number: 617-724-2358
Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
<http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2
www.nmr.mgh.harvard.edu/facility/filedrop/index.html
<http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
Outgoing:
ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu <mailto:Freesurfer@nmr.mgh.harvard.edu>
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The information in this e-mail is intended only for the person to whom it is
addressed. If you believe this e-mail was sent to you in error and the e-mail
contains patient information, please contact the Partners Compliance HelpLine at
http://www.partners.org/complianceline . If the e-mail was sent to you in error
but does not contain patient information, please contact the sender and properly
dispose of the e-mail.
