Falk,
If you have the .annot file for a subject, you can break that apart into individual label files using mris_annot2label. Then knowing which labels compose the parietal lobe (for the Desikan-Killiany atlas, superior and inferior parietal, supramarginal, precuneus and postcentral compose the parietal lobe), then you can create a new label file by combining the label files into one with a text editor (the second line is the number of vertices composing the label, so be sure to get that right). then use mris_anatomical_stats to get the stats on this new label.
Nick
On Mon, 2009-04-27 at 16:31 +0200, Falk Lüsebrink wrote:
Hi everyone,
I’d like to compare the individual cortical thickness results of Freesurfer with the results of another software. The other software measures the cortical thickness for example across the whole left parietal lobe. So I have to get the according value of the whole left parietal lobe of Freesurfer’s results. But I don’t know exactly how to do that.
Does someone have any suggestions how to get this value? At first glance I would weight the average thickness of every structure belonging to the parietal lobe given in the aparc.a2005s file by the number of vertices (or maybe the gray matter volume in case the volume had a resolution of 1mm^3?). Sum everything up and divide it by the number of vertices to get the mean average across the parietal lobe. Would that result in the value I’m searching for?
Thanks in advance,
Falk
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