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| 1. '''!IntraCranialVol (ICV)''' - estimate of the intracranial volume based on the talairach transform. See [wiki:Self:eTIV eTIV] for more details. This is the same measure as Estimated Total Intracranial Volume (eTIV). | 1. '''!IntraCranialVol (ICV)''' - estimate of the intracranial volume based on the talairach transform. See [[eTIV|eTIV]] for more details. This is the same measure as Estimated Total Intracranial Volume (eTIV). |
Notes on Brain Volume
Measures of brain volume
from mri_segstats --help
There will be four measures of brain volume in the output summary file produced by mri_segstats (aka <subj>/stats/aseg.stats):
BrainSegNotVent - sum of the volume of the structures identified in the aseg.mgz volume. This will include cerebellum but not ventricles, CSF and dura. Includes partial volume compensation with --pv. This is probably the number you want to report.
BrainMask - total volume of non-zero voxels in brainmask.mgz. This will include cerebellum, ventricles, and possibly dura. This is probably not what you want to report.
BrainSeg - sum of the volume of the structures identified in the aseg.mgz volume. This will include cerebellum and ventricles but should exclude dura. This does not include partial volume compensation, so this number might be different than the sum of the segmentation volumes.
IntraCranialVol (ICV) - estimate of the intracranial volume based on the talairach transform. See eTIV for more details. This is the same measure as Estimated Total Intracranial Volume (eTIV).