Dear all,
I am trying to add control points for a subject in order to improve normalization and skull stripping, but I found that the control points I added did not have much effect on the end result. I know control points should be added at points that the user feels sure are inside the white matter boundary, and that there should be about 20 spread out throughout the volume, but I am still uncertain as to how to choose them effectively. Should they be closer to the white/gray boundary? Or closer to the center?
I believe I would be able to choose these points more effectively if I understood how FreeSurfer uses control points. Is it used as a high or low cut-off thresh-hold? Or is it more complex than that? Is location taken into account or is it just the intensity values that are used?
Any help is greatly appreciated.
Thank you,
Sasha
Sasha Wolosin
Research Assistant
Developmental Cognitive Neurology
Kennedy Krieger Institute
707 N. Broadway
Baltimore, MD 21205
ph: (443) 923-9270
wolosin(a)kennedykrieger.org
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