Dear Emma,
I also find this to be a very interesting situation which can be
frusterating. One thing that I find useful is to take the coordinates of
all the actiavted voxels in the map and access their location via the
Talairach Deamon. As in:
http://rumba.rutgers.edu/~jason/more/tal.html
Or if you are only interested in the single
cluster you
can extract the cluster coordinates with Kalina Chrsitoff's ROI programs
http://www-psych.stanford.edu/~kalina/SPM99/Tools/roi.html and then follow
what is done on the above page.
What I mention only show the locations of voxels showing significance
above your threshold. If it is the T/Z values you are after and not just
the
locations then I agree with what Philippe Peigneux said as being a better
method.
cheers,
Jason.
On Wed, 4 Jul 2001, Emma Burton wrote:
> Dear All,
>
> I am currently trying to identify areas of significant change using the
> coordinates from the summary table. I have several questions from VBM
> analysis.
> Firstly when looking at particular clusters is it possible to veiw more than
> three peak Z scores and coordinates in the table under that cluster? For
> example one cluster has 3521 voxels and the table only gives three Z scores
> and different coordinates for this cluster. One of the coordinates is in
> the region of the parahippocampal gyrus and looking at the SPM map extends
> and includes the hippocampus etc . What I want to know is is there any way
> of displaying more than three Z scores and coordinates and when reporting
> areas of signifcant change should you just report those coordinates which
> have a Z score in the table or can you say that the cluster extends and
> includes other areas.
>
> Thanks
>
> Emma
>
Jason Steffener, RTS V
Department of Psychiatry
New Jersey Medical School
Newark, NJ USA
(973) 972-1604
http://www.umdnj.edu/~steffejr
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