Hi,
> I currently have a problem where I am trying to determine the mean
> percent signal change of the voxels within a box shaped volume. These
> voxels may or may not be above threshold in the statistical parametric
> map. I can't find any way to do this in SPM5. Generally speaking I can
> only get SPM5 to give information on one voxel at a time and never about
> a non-significant voxel.
You can get the raw data, and the mean of the data, using marsbar.
See: http://marsbar.sourceforge.net/
boxdef = struct('centre', [0 0 0], 'widths', [10 10 10]);
roi = maroi_box(boxdef);
D = mardo('SPM.mat');
y = getdata(roi, D);
That gets the data into a [number of images in design] x [number of
voxels in box] matrix.
Best,
Matthew
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