There is not a straight-forward way to do it as mri_glmfit-sim only
takes a clusterwise p-value threshold. You can change that until you get
20 voxels.

On 05/21/2017 09:48 AM, Elijah Mak wrote:
> Hi Everyone,
>
> How may I threshold the sig.mgh (p<0.001) with a cluster extent K > 20
> voxels? Is it possible to do this in Freesurfer?
>
> Thanks.
>
> Best Wishes,
> Elijah
>
> *Dr. Elijah Mak, Research Associate*
> Department of Psychiatry, Old Age Psychiatry Group
> University of Cambridge
> Trinity College, CB21TQ, UK
> http://www.neuroscience.cam.ac.uk/directory/profile.php?fkm24
>
>
>
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