Ed, I would use the values in the aseg.stats. I'm not sure why there is this difference (Doug might be able to elaborate on how the values in aseg.stats are calculated) but for v5.0, we went over how all the stats were being calculated and make sure the values in the aseg.stats were the most accurate. Allison
-- On Wed, 27 Oct 2010, Ed Gronenschild wrote: > Dear Bruce/Allison, > > Could you please try to give response to my question > which wm and gm volumes I shoud use, see my > today's submission below. > > Ed > > On 27 Oct 2010, at 14:41, freesurfer-requ...@nmr.mgh.harvard.edu wrote: > >> Dear Christian, >> >> Thanks for your suggestion. I followed the instructions to derive the >> GM and WM volumes. Here are the (rounded-off) results for one example: >> >> mris_volume lh.pial: 532767 >> mris_volume rh.pial: 536127 >> >> mris_wm_volume lh: 251139 >> mris_wm_volume rh: 254730 >> >> Accordingly: >> gm lh = 532767 - 251139 = 281628 >> gm rh = 536127 - 254730 = 281397 >> >> Left + right: >> total = 1068894 >> wm = 505869 >> gm = 563025 >> >> ------------ >> >> The aseg.stats file lists the following results: >> >> cortical wm lh: 251139 >> cortical wm rh: 254730 >> total wm: 505869 >> >> cortical gm lh: 263888 >> cortical gm rh: 265231 >> total cortical gm: 529119 >> subcortical gm: 181270 >> total gm: 710389 >> >> -------------- >> >> For wm both results are equal but for gm they are not. >> >> So now my question still exists: which wm and gm volumes should I take? >> >> Ed >> >> >> On 26 Oct 2010, at 20:40, freesurfer-requ...@nmr.mgh.harvard.edu wrote: >> >> > Dear Ed, >> > >> > to my knowledge, "mris_wm_volume" is the best option to determine the >> > white matter volume. >> > >> > See this wiki page for usage: >> > http://surfer.nmr.mgh.harvard.edu/fswiki/MorphometryStats >> > >> > Best wishes, >> > Christian >> > >> > >> > --- >> > Christian Scheel >> > Department of Psychiatry >> > University of Cologne >> > >> > >> > >> > >> > Am 26.10.2010 15:22, schrieb Ed Gronenschild: >> > > Hi, >> > > >> > > I post this once again because I didn't get any response. >> > > >> > > In the v5.0.0 aseg.stats file I can find the following volumes: >> > > >> > > - left/right cortical gray matter >> > > - subcortical gray matter >> > > - total cortical gray matter >> > > - total gray matter volume >> > > and >> > > - left/right cortical white matter >> > > - total cortical white matter >> > > >> > > How can I derive the total white matter volume? >> > > >> > > Ed >> > >> > _______________________________________________ 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.
