I don't understand why WM was cropped out. What command were you trying 
to use?

On 11/18/2020 2:39 AM, RENXI LI wrote:
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> Hi Freesurfer experts:
>
> I am trying to extract the mean-time series from the functional image using 
> mri_segstats. However, the cerebral white matter signals were cropped out in 
> my functional images, and the regions that I am trying to extract signal from 
> are close to the cerebral white matter that some voxels at the boundary may 
> not contain any signals. Is there any arguments in mri_segstats that I can 
> use to only extract voxels that has non-zero time-series?
>
> Best,
> Renxi
>
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