I've looked briefly at this with out data and cannot find any such bias to one side or another. Do you have reason to believe that it actually exists in your patient population? Do the images have any strong intensity gradients from right to left? Another option is to take one or two of your subjects and rescan them face-down to see if the bias reverses.
doug Jose Soares wrote: > > Hi all, > > The total rh surface is always bigger than the lh surface (I've > checked also the cerebral cortex volumes and the rh are also bigger > than the lh volumes). > > I have the rh_medialorbitofrontal area bigger in 30 of my 32 subjects, > but when I compare the lateralorbitofrontalareas, these appear to be > good in the two hemispheres (is this normal this difference between > the two hemispheres in the medialorbitofrontal and the similarities in > lateralorbitofrontal areas?). > > The values are not wrong because of the bug in parac2table once I've > checked it manually in aparc.stats files. > > Should I normalize the individual areas to the correspondent lh or rh > hemisphere? What suggestions do you have? > > Thanks a lot for all the help, > > Jose. > > > What's the total surface area of the rh? Is it bigger than the lh? > On Fri, > 13 Aug 2010, Jose Soares wrote: > > > What is the best way to check the segmentation in > medialorbitofrontal area? > > > > I have almost every subjects with this abnormal areas on rh. > They are from healthy population. > > > > Thanks for the help, > > > > Miguel. > > > > > > It's not unusual to have asymmetries in some patients. I have > seen some myself in AD. Have you checked the segmentation in those > areas? > > > --------------------------------------------------------------------- > > > > > > Pedro Paulo de Magalhães Oliveira Junior > > Diretor de Operações > > Netfilter & SpeedComm Telecom-- www.netfilter.com.br > > -- For mobile: http://www.netfilter.com.br/mobile > > > > > > > > > > > > > > > > On Fri, Aug 13, 2010 at 07:12, Jose Soares > <zmsoa...@yahoo.com.br </mc/compose?to=zmsoa...@yahoo.com.br>> wrote: > > > > > > Hi all, > > > > I am doing a study about the medialorbitofrontal, and I am > having some strange area results in a lot of subjects. > > > > > > > > The rh areas are much higher than the lh areas of > medialorbitofrontal: Some examples: > > > > lh rh > > > > > > > > > > 1714.0 > > 2822.0 > > > > > > 1720.0 > > 2632.0 > > > > > > 1728.0 > > 2675.0 > > > > > > 1877.0 > > 2733.0 > > > > > > 1498.0 > > 2719.0 > > > > > > 2067.0 > > 2542.0 > > > > > > 1870.0 > > 2666.0 > > > > > > 1554.0 > > 2263.0 > > > > > > 1535.0 > > 2566.0 > > > > > > 1794.0 > > 2392.0 > > > > > > 1487.0 > > 2547.0 > > > > > > Why is this happening, any idea? Should I do any correction? > > > > Thanks for the help, > > > > Miguel. > > > > > > > > > > > > > > _______________________________________________ > > > > Freesurfer mailing list > > > > Freesurfer@nmr.mgh.harvard.edu > </mc/compose?to=freesur...@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. > > > > > > > > > > > > -----Anexo incorporado----- > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > </mc/compose?to=freesur...@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. > > > > > > > > > > -----Anexo incorporado----- > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > </mc/compose?to=freesur...@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 -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
