Hi Michael, It might have something to do with low myelin content there in general (will make grey matter harder to tell from CSF) and late myelination (at least part of the anterior temporal cortex has its white matter myelinate quite late in development), which would reduce grey/white contrast.
As to what to do about it, I don't know. Peace, Matt. -----Original Message----- From: freesurfer-boun...@nmr.mgh.harvard.edu [mailto:freesurfer-boun...@nmr.mgh.harvard.edu] On Behalf Of Michael Harms Sent: Wednesday, November 02, 2011 4:02 PM To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] anterior temporal lobe problems Hi guys, We have a sample of 150+ pediatric brains that we pumped through FS 5.1, and in an easy majority of them the white/pial surface accuracy in the anterior temporal lobe is poor. I know that this is an area where problems have frequently been reported. What is it about that area in particular that makes it difficult to get accurate surfaces? (Is the contrast and SNR in that area inherently worse?) And, short of a large time commitment of control point and wm.mgz editing, are there any flags/tweaks that we could attempt to fix the problem in a more automatic fashion? thanks, -MH -- Michael Harms, Ph.D. -------------------------------------------------------------------- Conte Center for the Neuroscience of Mental Disorders Washington University School of Medicine Department of Psychiatry, Box 8134 Renard Hospital, Room 6604 Tel: 314-747-6173 660 South Euclid Ave. Fax: 314-747-2182 St. Louis, MO 63110 Email: mha...@wustl.edu -------------------------------------------------------------------- _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
