Hi Bruce, Thanks for your response. Then I assume that I can divide these values by 5 and present them as area of the CC on the midline section, right?
Have a nice week-end, Marie On Apr 13, 2013, at 5:18 AM, Bruce Fischl <fis...@nmr.mgh.harvard.edu<mailto:fis...@nmr.mgh.harvard.edu>> wrote: Hi Marie It is mm^3 of I believe a 5 mm thick cc. We don't measure the thickness by default Cheers Bruce On Apr 13, 2013, at 2:18 AM, Marie Schaer <marie.sch...@unige.ch<mailto:marie.sch...@unige.ch>> wrote: Hi Bruce, Thanks for your response. My question was indeed: what is the unit of the CC_* output in the aseg.stats? E.g. in the attached file, the last 5 rows depict CC segmentation measurements (between ~400+ and 900+), and I was wondering what was the unit of these measurements. The other values are clearly mm^3, but what about the CC? From what I understood from Diana Rosas' paper, the CC was measured as the thickness / distance from the medial axis of the CC to the superior and inferior boundaries, but I may have wrongly understood. Thanks for the clarification, Marie On Apr 12, 2013, at 8:07 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu<mailto:fis...@nmr.mgh.harvard.edu>> wrote: > Hi Marie, > 400 or 900 what? Not mm. How are you calculating thickness? I think in > Diana's paper it was the radius of the inscribed circle on the medial axis, > wasn't it? > Bruce > > > On Apr 12, 2013, at 10:44 PM, Marie Schaer > <marie.sch...@unige.ch<mailto:marie.sch...@unige.ch>> wrote: > >> >> Hi all, >> >> I have a quick question related to the corpus callosum segmentation: I read >> in previous posts that the reference explaining more about the CC >> subdivision in 5 segments was the one by Rosas et al, Neuroimage 2010. But >> in this publication, you show thickness of the corpus callosum as the main >> outcome variable, with average values ranging from ~4 to 9 mm. And when I >> extract the values from the aseg.stats, in my dataset I rather get average >> values that are ranging between ~400 and 900 depending on the segment. Do >> these values correspond to thickness in mm/100, or to area, or to something >> else? Is that a thickness measurement, or a surface area measurement? >> >> Many thanks in advance for your reply, >> >> Marie >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu<mailto: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. > <aseg.stats>
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