Hi Lilla we have a large dataset already processed with FSv5.1; before processing it with FSv6, we thought to assess -on a smaller subset - how significant are the differences between the measurements output by the two versions.
On the other point, my question was about differences between the two versions in relating volume with number of voxels. I can see that in FS5, the volume has the same value as the number of voxels, whereas this does not hold in FS6. So I was wondering the reasons behind that. thank you gianluca > On 13 Dec 2017, at 19:24, Lilla Zollei <lzol...@nmr.mgh.harvard.edu> wrote: > > > Hi Gianluca, > >> I am working with data coming from two different versions of Freesurfer, >> v5.1 and v6. >> As measurements looks different (an excerpt below from aseg.stats files), I >> am trying to see if that difference is statistically relevant. >> Could you anticipate something with this respect? > > We do not advise you to include data processed with different versions in the > same study as there are differences between our releases. > >> One more question is about voxel counting and their volume. aseg.stats >> prints out that # VoxelVolume_mm3 1 >> but volumes from v.6 seems to be sometimes greater sometimes lower than the >> voxel number, >> while in v. 5.1 they correspond. >> Could you give me some clarification? > > I do not understand your question. Are you asking about the volume > differences between the two versions? > > Lilla > >> >> v.6 >> >> # ColHeaders Index SegId NVoxels Volume_mm3 StructName normMean normStdDev >> normMin normMax normRange >> 1 4 5424 5779.6 Left-Lateral-Ventricle 22.1768 >> 15.6303 0.0000 81.0000 81.0000 >> 2 5 198 225.9 Left-Inf-Lat-Vent 43.8838 >> 14.0865 6.0000 77.0000 71.0000 >> 3 7 17444 18248.8 Left-Cerebellum-White-Matter 80.5691 >> 8.7322 20.0000 133.0000 113.0000 >> 4 8 69258 69340.7 Left-Cerebellum-Cortex 49.2701 >> 12.9332 0.0000 128.0000 128.0000 >> 5 10 8758 8432.7 Left-Thalamus-Proper 81.4639 >> 10.8500 37.0000 123.0000 86.0000 >> >> v. 5.1 >> >> # ColHeaders Index SegId NVoxels Volume_mm3 StructName normMean normStdDev >> normMin normMax normRange >> 1 4 5013 5013.0 Left-Lateral-Ventricle 16.7825 >> 16.6860 0.0000 82.0000 82.0000 >> 2 5 161 161.0 Left-Inf-Lat-Vent 39.9084 >> 12.2446 7.0000 73.0000 66.0000 >> 3 7 19250 19250.0 Left-Cerebellum-White-Matter 83.1263 >> 8.1640 41.0000 110.0000 69.0000 >> 4 8 60246 60246.0 Left-Cerebellum-Cortex 50.8222 >> 10.7915 5.0000 93.0000 88.0000 >> 5 10 7911 7911.0 Left-Thalamus-Proper 88.1600 >> 10.4226 43.0000 134.0000 91.0000 >> >> >> >> >> > > > 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 > <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.
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ 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.
