Hi Doniel,
You can easily use aal to do this. Take the total
size of the activated cluster (e.g., k = 257) and
the calculated % of voxels in a ROI given by aal
(e.g., 22%) and compute:
22% of 257 = 257/100*22 = 56,54
i.e., 57 voxels in that ROI.
best,
Anja
Dr. Anja Ischebeck
Innsbruck Medical University
Clinical Department of Neurology
Anichstrasse 35
A-6020 Innsbruck - Austria
tel.: +43 (0) 512 504 23661
>>> "<Doniel> <Drazin>" <[log in to unmask]> 04.08.2005 22:29 >>>
Hi,
I am relatively new to SPM and could use some guidance from the senior
researchers on this listserve. I have analyzed some data using SPM2 and
then went on to look at the ROI using SPM2, Marsbar and AAL. I am trying
to determine the number of voxels in each ROI. I have the coordinates,
percentages per clusters as well as all the information on the footnote of
the page (i.e.threshold, Expected voxels per cluster, voxel size, etc) but
I am not sure how to get to the next level. Is there a calculation that I
need to make? Please advise.
Thank you for your time,
Doniel
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Doniel Drazin
Neural Plasticity Lab
Stanford University
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