If you run the full pipeline you should have the eTIV measure in the stats files.
If you run --seg_only then you will not get etiv by default, as that requires the talairach registration.
You may also want other use the --3T flag for 3T images so that the correct atlas is used (same as in FreeSurfer).
On 16. Jul 2025, at 15:22, Marco Ganzetti <marco.ganzetti@biogen.com> wrote:
Dear,
I would like to know how to extract the total intracranial volume after running Fastsurfer.
The aseg.stats file only report the following regions:
# Measure Mask, MaskVol, Mask Volume, 1378561.000000, mm^3
# Measure BrainSeg, BrainSegVol, Brain Segmentation Volume, 1112716.172377, mm^3
# Measure BrainSegNotVent, BrainSegVolNotVent, Brain Segmentation Volume Without Ventricles, 1095647.392151, mm^3
# Measure SupraTentorial, SupraTentorialVol, Supratentorial volume, 966887.205081, mm^3
# Measure SupraTentorialNotVent, SupraTentorialVolNotVent, Supratentorial volume, 949818.424855, mm^3
# Measure SubCortGray, SubCortGrayVol, Subcortical gray matter volume, 58370.262413, mm^3
# Measure rhCerebralWhiteMatter, rhCerebralWhiteMatterVol, Right hemisphere cerebral white matter volume, 235981.558256, mm^3
# Measure lhCerebralWhiteMatter, lhCerebralWhiteMatterVol, Left hemisphere cerebral white matter volume, 231717.193880, mm^3
# Measure CerebralWhiteMatter, CerebralWhiteMatterVol, Total cerebral white matter volume, 467698.752136, mm^3
I don’t see any eTIV.
Regards
Marco