Hey Ziad,

Thanks for getting back to me. This sounds like it could work, but I'm not sure how to implement this.

After I draw my rois, I run ROI2dataset to convert to 1D format. I then run ROIgrow. ROIgrow seems to grow all nodes in the 1D file I input. I haven't been able to specify growing a subset of rois within my input file (e.g. only rois with value greater than 1). When I input an roi with a full node list, the ouput of ROIgrow is just the full node list (since it already contains all nodes, it has nowhere to grow). I don't think I can grow my roi from a dataset that contains a full node list and I'm not sure if I can take the output of ROIgrow and convert include a full node list.

This is my typical command line:
ROIgrow -i_fs /surfaces/ma/SUMA/lh.full.patch.flat.asc -roi_nodes roi_lh.1D.dset'[0]' -lim 2 -prefix roi_grown_lh

The method you previously suggested of using ConvertDset will work if I don't combine my rois. Though it would be optimal in my case if I could combine my rois, it is not necessary. One possible fix I see would be if ROIgrow could grow the nodes based on the roi values (all values greater than 1). A full node list could then be input. Of course there would be a problem if rois grew into each other.

Thanks again Ziad. If there is no apparent solution, I will continue to process each ROI separately. I would really like to see an option added to ROIgrow to grow based on the roi value, but this may not be of interest to others.

Mike