make_geodesic_volume

create a geodesic distance volume from a seed point in a MINC volume

make_geodesic_volume input.mnc output.mnc threshold x y z [x_size] [y_size] [z_size]

DESCRIPTION

make_geodesic_volume computes a geodesic distance volume with respect to a seed point at world coordinates (x, y, z). The geodesic distance is computed through voxels in the input volume that exceed the specified threshold, measuring the shortest path distance along connected voxels from the seed point to every other above-threshold voxel.

Optional x_size, y_size, and z_size parameters control the output volume dimensions. If not specified, the dimensions match the input volume.

The output volume contains the geodesic distance at each voxel, which is useful for measuring distances along structures such as cortical surfaces or white matter tracts.

EXAMPLES

make_geodesic_volume brain.mnc geodesic.mnc 0.5 0 0 0

make_geodesic_volume brain.mnc geodesic.mnc 0.5 10 -20 5 64 64 64

SEE ALSO

chamfer_volume, make_gradient_volume

AUTHOR

David MacDonald - McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University.

COPYRIGHTS

Copyright © 1996 by David MacDonald