Instead of manually drawing ROIs, I had hoped to use some type of region growing tool. For instance, I would like to be able to click on a voxel and then automatically grow or build a region around it of similar voxels. Does FSL have any such tool, or general purpose erosion and dilation tools available? I have looked through a lot of the documentation and cannot find anything.
If not, can someone recommend a (open source) compatible application that might have such tools? I know BrainVoyager does (but is not free), and I am going to check FreeSurfer.
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