I am using the coordinates obtained with the matlab function "read_label()". I send you one of my labels.
Thanks a lot, Yolanda 2011/5/3 Douglas N Greve <gr...@nmr.mgh.harvard.edu> > Which coordinates are you using? Can you send me the label? > doug > > Yolanda Vives wrote: > >> Hi Doug, >> >> The problem is that when I put the coordinates in a MNI altas, it says >> that they correspond to the caudate and not to the cingulate and I would >> like to know if the procedure that I am following is correct. >> >> Regards, >> Yolanda >> >> 2011/5/3 Douglas N Greve <gr...@nmr.mgh.harvard.edu <mailto: >> gr...@nmr.mgh.harvard.edu>> >> >> >> Hi Yolanda, they should already be in mni305 coordinates, so the >> identity matrix is correct. Did you find a potential problem? >> doug >> >> Yolanda Vives wrote: >> >> Hi all, >> I am interested in obtaining the MNI or talairach coordinates >> of a label. The procedure that I have performed is the following: >> First of all I have performed a QDEC analysis. From the >> results, I have drawn a label of a significant area of the >> brain, that corresponds to the cingulate. Afterwards, I have >> used the matlab function read_label to obtain the RAS >> coordinates of this label. To transform these coordinates into >> mni coordinates, I have read that if v = [R A S 1]' and X >> matrix is the matrix from talairach.xfm, then vMNI = X*v >> Taking this into account, I have used the X matrix from the >> talairach.xfm of "fsaverage" (where the results of qdec are >> mapped). This matrix is >> 1.0 0.0 0.0 0.0 >> 0.0 1.0 0.0 0.0 >> 0.0 0.0 1.0 0.0 >> so vMNI is the same as v. When I introduce v (or vMNI) >> coordinates into a MNI atlas, I don't obtain the cingulate. >> >> Could you please help me with this procedure? >> Thank you in advance, >> Yolanda >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Freesurfer mailing list >> 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> >> >> 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: www.nmr.mgh.harvard.edu/facility/filedrop/index.html >> <http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html> >> >> >> >> >> 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. >> >> >> >> >> -- >> Yolanda Vives >> PIC (Port d'Informació CientÃfica) >> Campus UAB, Edificio D >> E-08193 Bellaterra, Barcelona >> Telf. +34 93 586 8232 >> http://www.pic.es >> Avis - Aviso - Legal Notice: http://www.ifae.es/legal.html >> > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > >
right_posterior_cingulate.label
Description: Binary data
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