Dear Stefan Kiebel,
thanks a lot for your new spm_regions script.
I have to put one qustion on it:
in the old version one had a direct control which voxel were selected by
the algorithm -> It was produced a new crystal brain were only the
selected voxel were indicated.
In your new script there is instead a fix picture with this VOI-circle
Does your new script provides the control of the selected voxel too?
Thank´s a lot in advance!
Matthias Moosmann
[Charité]
Neurologische Klinik
Schumannstraße 20/21, 10098 Berlin
030 2802 5113
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>Marta,
>
>> I'm looking for a way to extract the average signal of a cluster (of
>> activation map)
>> in order to analyse it. Is it possible within SPM99 do this?
>> I would like to add some additional questions to the above request,
>> though perhaps it's already implied in the previous message.
>> Is it possible within SPM99 to plot the average behavior of all
>> significant voxels in a small cluster rather than plotting for just a
>> single selected voxel? And it is possible analyse separatly the
signal
>> of
>> two or more adjacent clusters?
>
>Yes, yes and yes. To make SPM99 extract a signal from a cluster, you
>need some update to spm_regions.m, which I just copied into the
>update-section.
>
>ftp://ftp.fil.ion.ucl.ac.uk/spm/spm99_updates/
>
>You'll need three files:
>spm_regions.m
>spm_filter.m
>spm_dcm_display.m
>
>In the results section, click onto the 'V.O.I.' button and follow the
>instructions. SPM will then extract the first eigenvariate from a
>cluster, which is similar to its average signal, but provides a better
>representation of what is going on in the cluster over time. The
>extracted first eigenvariate can be accessed as variable Y in the
matlab
>workspace.
>
>Stefan
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