Re: [Freesurfer] BrainSegVol different in wmparc and aseg

-- On Fri, 12 Nov 2010, Jeff Sadino wrote: > bump :) > > On Tue, Nov 9, 2010 at 11:38 AM, Jeff Sadino jsadino.queens@gmail.comwrote: > >> Hello, >> >> When I look at the BrainSegVol and BrainSegVolNotVent in wmparc.stats, the >> values are around 200,000 - 300,000. However, when I look at the same >> measures in aseg.stats, the values are around 1.1L - 1.5L. When I sum up >> the individual ROIs in wmparc, it comes out to >1L. I am currently using >> freesurfer 4.3.1. When I look at the aseg.stats files from freesurfer >> 3.0.5, ran on the same subjects, the values are up around that 1 - 1.5L >> range. This is consistent across all of our subjects: > 100 and from two >> different scanners at two locations. >> >> From my wmparc file: >> # Measure BrainMask, BrainMaskNVox, Number of Brain Mask Voxels, 1774481, >> unitless >> # Measure BrainMask, BrainMaskVol, Brain Mask Volume, 1774481.000000, mm^3 >> # Measure BrainSegNotVent, BrainSegVolNotVent, Brain Segmentation Volume >> Without Ventricles, 243312.000000, mm^3 >> # Measure BrainSeg, BrainSegNVox, Number of Brain Segmentation Voxels, >> 275688, unitless >> # Measure BrainSeg, BrainSegVol, Brain Segmentation Volume, 275688.000000, >> mm^3 >> # Measure IntraCranialVol, ICV, Intracranial Volume, 1302696.178406, mm^3 >> >> >> My question is why would wmparc so severely underestimate the BrainSegVol >> measure? If I can not fix it, should I take the BrainSegVol from the >> aseg.stats file? >> >> Thank you! >> Jeff Sadino >> >