Dear Bruce,

thank you for your comprehensive explanation.

Best,

Nazanin

On Thu, Jan 19, 2017 at 7:00 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:

Hi Nazanin

there is no easy way to display a partial volume. You can still use Dice/Jaccard on the hard segmentations, but we have found that the partial volume correction improves e.g. test/retest reliability and probably accuracy, although that is harder to prove.

cheers
Bruce

On Thu, 19 Jan 2017, N Saf wrote:

Dear Bruce

is there any 3D image file which shows the segmentation regions after this
correction ?and if there is not is it right to use aseg.mgz file for
reporting Dice or Jaccard Index (I have manual segmentation as gold
standard)?

Best Regards,
Nazanin




On Wed, Jan 18, 2017 at 5:18 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu>
wrote:
      Hi Nazanin

      the volumes reported in the aseg.stats file have been corrected
      for partial volume effects.

      cheers
      Bruce
      On Wed, 18 Jan 2017, N Saf wrote:

            Dear FreeSurfers,
            I have a question about aseg file. I load the aseg
            file of bert subject in
            itk-snap and read the volume for 17 and 53 label but
            it is a bit larger of
            the volume in bert stats file. I do the same for
            some of my subjects too and
            I see the same result .I don't know why it is like
            that ?would you please
            clear the reason for me.because I need to  compare
            the FreeSurfer result and
            I should use of aseg file labels but I'm afraid the
            comparison I'm doing is
            not valid.   

            Sincerely yours,
            Nazanin
             


_______________________________________________
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.

_______________________________________________
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.