Thanks Doug. Do you know if the Freesurfer volumes in mm^3 that are posted on the ADNI website (particularly the longitudinal studies) include partial volume corrections? i.e., if they were run to include partial volume calculations?
Thank you, John On 2012-11-30, at 3:11 PM, Douglas N Greve <gr...@nmr.mgh.harvard.edu> wrote: > Hi John, it has been a long time since I looked at version 4.3, so I > don't know if it can or not. One thing you can try is to use the version > 5.x mri_segstats (the program which computes the aseg.stats table). You > could run this outside of recon-all and generate a file with a different > name. That way you won't have to worry about mixing version. > doug > > > On 11/30/2012 03:00 PM, John Drozd wrote: >> Hello, >> >> My freesurfer version is freesurfer-Linux-centos4_x86_64-stable-pub-v4.3.0 >> >> I noticed that the aparc+aseg.mgz label map is resampled to 1mm x 1mm >> x 1mm voxels, >> eventhough the .mgz grayscale mri image file remains as per the >> original voxel size and is not 1x1x1. mri_convert .nii to .mgz >> translates the grayscale image down the y direction in the horizontal >> plane transverse/axial slices. >> >> I noticed that the aseg.stats files list the number of voxels and the >> volume, and these numbers match because the voxel size is 1 x 1 x 1. >> >> My question is whether freesurfer 4.3 can be invoked to perform >> partial volume error corrections, and if so how do you invoke this >> feature? >> >> My interests lie in segmentations of the lateral ventricles including >> their posterior and inferior horns. >> >> thank you, >> john >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 > Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > _______________________________________________ > 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
