Hi Zhiyong,
That sounds okay, though just report what you are doing. Note
that you would be starting with a significant cluster and then
restricting it to an anatomical ROI. That should be okay.
Consider also 'whereami -omask MASK ...', where MASK is the
ordered cluster mask from your clusters (i.e. from the 'SaveMsk'
button in the Clusterize Report, or from 3dmerge -1clust_order).
That might do what you want, but more completely.
- rick