Hi Donna, In that same paper we also comment on the differences between expansion/contraction and absolute areal measurements assessed at each face of the surface (i.e., facewise), which can, after interpolation, be converted to vertexwise to facilitate analysis using current tools (e.g., mri_glmfit or qdec), without loss of areal quantities.
All the best, Anderson On 11 October 2014 04:05, Donna Dierker <[email protected]> wrote: > Hi Emma, > > I might not be the only one who is unsure what you mean by a vertex-wise > cortical surface area measure. Do you mean something like what is > illustrated in figures 2 and 3 here: > > http://www.pnas.org/content/107/29/13135.figures-only > > ... which is similar, but not identical to the local gyrification index? > > If so, would you use this measure on surfaces before or after registration > to a target atlas? > > Donna > > > On Oct 10, 2014, at 4:19 PM, Emma Thompson <[email protected]> wrote: > > > Dear Freesurfers, > > I recently heard that there are several disadvantages to using a measure > of cortical surface area in Freesurfer, specifically due to conducting a > vertex-wise analysis. Can someone help me understand why a measure of > surface area using this approach might be flawed? Thanks! > > > > _______________________________________________ > Freesurfer mailing list > [email protected] > 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. > >
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