Hi, I'm using a lot of control-points (typically 200-500) to compensate for intensity inhomogeneities in my images. This tends to create a rather uniformly looking white matter without any clearly discernible anatomical landmarks, such as the basal ganglia, etc. Does this mean that the subcortical segmentation won't work properly? Will this munificent use of control-points constitute a source of error for the cortical segmentation, or are the protocols relatively robust?
Thanks,
Martin Ystad Medical Student University of Bergen Institute of Biomedicine Jonas Lies vei 91, 5009 Bergen, Norway.
Hi Martin,
the control points won't hurt the aseg unless you actually put them in the basal ganglia or thalamus. As long as they are clearly in wm you should be fine. Bruce
On Mon, 5 Dec 2005, Martin Ystad wrote:
Hi, I'm using a lot of control-points (typically 200-500) to compensate for intensity inhomogeneities in my images. This tends to create a rather uniformly looking white matter without any clearly discernible anatomical landmarks, such as the basal ganglia, etc. Does this mean that the subcortical segmentation won't work properly? Will this munificent use of control-points constitute a source of error for the cortical segmentation, or are the protocols relatively robust?
Thanks, Martin Ystad Medical Student University of Bergen Institute of Biomedicine Jonas Lies vei 91, 5009 Bergen, Norway. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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Bruce Fischl -
Martin Ystad