Hi Bruce, Yes, it should be classified as a gray matter, if I save a point of an heterotopia in the tkmedit and then open it in tksurfer the point showed at the inflated surface correspond to that point or to the projection of the heterotopia in the cortical surface? what happen with these measures if sometimes the heterotopias are outlined by the yellow line and sometimes are not? I don't know if I'm totally clear.
Thanks, Best, Carolina 2011/7/21 Bruce Fischl <fis...@nmr.mgh.harvard.edu> > Hi Carolina, > > no, the aseg cortex/wm is not used for thickness or volume (it can be, but > we don't recommend it). The surfaces are. As for the heterotopias, I don't > really know what a good output would be. It depends what you want to do with > them. I guess they should be gray matter, no? > > Bruce > > > > On Thu, 21 Jul 2011, Carolina Valencia wrote: > > Hi Bruce,thanks for your explanation. I was thinking the the segmentation >> region is used to calculate cortical thickness, by the way, is >> it used for calculate something? such as the GM volumes? I want to know >> this to be sure if in some point I have to fix this. About the >> heterotopias, is a good output to have someones classified as WM, other as >> GM and sometimes are outlined by the yellow line and sometimes >> are not? >> >> Best regards, >> >> Carolina >> >> 2011/7/19 Bruce Fischl <fis...@nmr.mgh.harvard.edu> >> Hi Carolina, >> >> it looks mostly to me like the surfaces are in the right place (the >> yellow and red lines). Don't look at the colored overlay - >> that is the aseg voxel segmentation and not what we typically use for >> cortical morphometry. Only look at the yellow and red >> lines. >> >> >> cheers >> Bruce >> On Tue, 19 Jul 2011, Carolina Valencia wrote: >> >> tiff I guess, I took the pictures from FS >> >> 2011/7/19 Bruce Fischl <fis...@nmr.mgh.harvard.edu> >> what format are the files in the archive in? They don't have an >> extension >> >> On Tue, 19 Jul 2011, Carolina Valencia wrote: >> >> >> I hope this attachement works.I also noticed that some >> heterotopias are classified as WM, other as GM and sometimes >> are outlined by the yellow line and >> sometimes are not. >> >> Best regards, >> >> Carolina >> >> 2011/7/19 Bruce Fischl <fis...@nmr.mgh.harvard.edu> >> Hi Carolina, >> >> can you gzip it or use compression? Usually people can send >> a few images to the list. >> >> cheers >> Bruce >> On Tue, 19 Jul 2011, Carolina Valencia wrote: >> >> Dear FS experts, >> I'm trying to analyse a case of cortical dysplasia, but >> after recon-all I see some errors in tkmedit that I >> don't know what to edit. I found some >> errors >> in cortical and >> subcortical segmentation, I don't find in the failure mode >> presentation a way to solve this. >> I saw the pial surface (yellow line) with acceptable >> accuracy but the GM (the red one) in some regions are >> misplaced (WM classified as GM and some >> GM not >> classified (empty >> color)) >> I tried to attached an image to illustrate the problem but >> I don't succeed, because the mailing list reject my >> email. How I can send you an image of >> ~700kb? >> >> Thanks a lot, >> >> Carolina >> >> >> >> >> 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<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. >> >> >> >> >> >> >> >>
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