AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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Daniel Glen
October 22, 2009 02:12PM
I assume you are using 3dclust and not 3dcalc. I believe the -1erode and -1dilate options are ignored by 3dclust, but you can use the 3dmerge command with those options to do erosion and dilation of the clusters. Changing the threshold may well change the shape of the clusters, especially voxels on the edge of a cluster. Even if a voxel value is high, its neighbors may have low values, and the voxel will not be included in the cluster.

The interactive clusterize tool in the AFNI GUI is a great tool for seeing the effects of varying the threshold, cluster radius and volume. It can also produce a 3dclust command for you.
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Subject Author Posted

quick check

Elisa October 22, 2009 01:36PM

Re: quick check

Daniel Glen October 22, 2009 02:12PM

Re: quick check

Elisa October 22, 2009 02:43PM

Re: quick check

Daniel Glen October 22, 2009 02:55PM

Re: quick check

Elisa October 22, 2009 05:39PM