grid_statistics

Compute statistics on deformation grid: Jacobian, harmonic energy, magnitude.

grid_statistics <input_field> [options]

DESCRIPTION

grid_statistics computes various statistics from a deformation grid field stored in MINC format. It can output the Jacobian determinant, displacement magnitude, and determinant maps as separate volumes, and optionally compute harmonic energy. Results can be restricted to a mask region and exported in CSV format for further analysis.

This tool is commonly used to assess the quality and properties of deformation fields produced by non-linear registration.

OPTIONS

--verbose

Print progress information during processing.

--jacobian file

Write the Jacobian determinant map to the specified MINC file.

--mag file

Write the displacement magnitude map to the specified MINC file.

--det file

Write the determinant map to the specified MINC file.

--log

Compute the log of the Jacobian determinant.

--mask file

Restrict statistics computation to voxels within the specified mask volume.

--csv

Output statistics in CSV format.

EXAMPLES

# Compute Jacobian determinant from a deformation field
grid_statistics deformation.mnc --jacobian jacobian.mnc

# Compute magnitude and Jacobian with a mask
grid_statistics deformation.mnc --mag magnitude.mnc --jacobian jacobian.mnc \
    --mask brain_mask.mnc

# Output statistics in CSV format
grid_statistics deformation.mnc --csv --mask brain_mask.mnc

AUTHOR

Vladimir S. Fonov - McConnell Brain Imaging Centre, Montreal Neurological Institute.

COPYRIGHTS

Copyright © 2009-2024 by Vladimir S. Fonov

SEE ALSO

grid_proc , grid_2_log , DemonsRegistration