Hi Patrik we report both the number of voxels and the volume of each structure in the stats files. Even for 1mm data we use partial volume estimation in the newer versions so that these numbers will not be the same. In general we find that the partial volume estimation helps accuracy, and that 6.0 is usually more accurate than 5.2
cheers Bruce On Thu, 1 Feb 2018, Patrik Krumpolec wrote: > I want to ask about differences in brain segmentation with freesurfer version > 5.2.0 and 6.0.0.My > dicom data have original size 0.375x0.375x0.75 mm and 600, 640, 224 voxels. > If I process the data > vith the version 5.2.0, freesurfer conformed the data to 1 mm size and 256 > voxels for all > directions. In the result brain structures has volume eguals to number of > voxels. > But if i use version 6.0.0, there are data not conformed and in the results > the volume of structure > is different form number of voxels. > > So, now I don't know what results is correct: from the version 5.2.0 or 6.0.0 > > At first I think that version 6.0.0 is not good because my collegues from > another institution have > results with the volume eguals to number of voxels (version 5.3) but they > have data with voxel size > 1x1x1 mm. So, I think that it is natural that volume is eguals to number of > voxels. But my data have > not 1x1x1 mm voxel size. > > Please, Could You help me! Thank You very much! > > patrik krumpolec > > _______________________________________________ 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.
