I believe you are right, John. As I'm running it again, the initial surface generated and displayed (prior to error correction) does not contain the truncation, so it is most likely the error correction. I will run it again without error correction to confirm and then try adjusting my peaks; I won't waste anyone's time (Donna) looking at the data if I can correct it based on the advice given. Thanks so much, Donna and John, for your help and prompt responses.
Best, Matt On Tue, Jan 26, 2010 at 11:48 AM, John Harwell <[email protected]>wrote: > Matt, > > On the Segmentation Operations page, try either unchecking the Volume Error > Correction Method or setting it to SUREFIT. It is possible that there is a > large topological defect and the GRAPH (based on Automated graph-based > analysis and correction of cortical volume topology DW Shattuck, RM Leahy - > IEEE Trans. Med. Imaging, 2001) algorithm is removing a large handle rather > than filling a large hole (possibly the gyri that appear to touch in the > left side of your image). > > ----------------------------------- > John Harwell > [email protected] > > Department of Anatomy and Neurobiology > Washington University School of Medicine > 660 S. Euclid Ave Box 8108 > Saint Louis, MO 63110 > > > > > On Jan 26, 2010, at 10:31 AM, Matthew Ward wrote: > > > Good morning, everyone. I've recently encountered a problem I haven't > experienced before (attached). I've segmented this brain several times > before (but not in a good while) with great results, but I cannot for the > life of me figure out why my segmentation volume is truncated about 2/3s out > from the midline. I did not run a full segmentation, just a quick check on > the GM/WM settings (turned off 'fill ventricles', 'generate inflated/very > inflated/ellipsoid/cerebral hull and curvature...attributes). Any ideas on > why this truncation is occurring? When setting the GM/WM cutoffs, the > segmentation overlay did not show this truncation. Thanks for any help. > > > > Best, > > > > -- > > Matt > > <Picture 11.png><Picture > 12.png>_______________________________________________ > > caret-users mailing list > > [email protected] > > http://brainvis.wustl.edu/mailman/listinfo/caret-users > > > _______________________________________________ > caret-users mailing list > [email protected] > http://brainvis.wustl.edu/mailman/listinfo/caret-users > -- Matthew K Ward Ph.D., B.Sc. Research Associate, Vision Sciences Center for the Development of Functional Imaging University of Alabama at Birmingham 205 934-2037 [email protected]
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