not sure what you mean. You can load the data into matlab and use the matlab hist function to look at histograms. For example, from the subject's mri directory:

...

[vaseg, M,mr] = load_mgh('aseg.mgz'); [vnorm, M,mr] = load_mgh('norm.mgz'); ind_wm = find(vaseg == 2); ind_gm = find(vaseg == 3); hist(vnorm(ind_wm),255); hold on hist(vnorm(ind_gm),255);

where the 2 and 3 come from the FreeSurferColorLUT.txt file and correspond to left cerebral white matter and left cortical gray matter respectively.

cheers, Bruce

On Thu, 17 Sep 2009, africa millan wrote:

Hi,

Is there any tool or function to create a histogram to check if I am distinguishing in the right way the white matter from the grey matter??

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