Processing math: 100%

SHAPE_Sphericity is how spherical a Volume of Interest is. Sphericity is equal to 1 for a perfect sphere.

SHAPE_Sphericity=π1/3(6V)2/3A

where V and A correspond to the volume and the surface of the Volume Of Interest based on the Delaunay triangulation.

 

SHAPE_Compacity reflects how compact the Volume of Interest is.

SHAPE_Compacity=A3/2V

where V and A correspond to the volume and the surface of the Volume Of Interest based on the Delaunay triangulation.

see:

 

SHAPE_Volume (mL and voxels) is the Volume of Interest in mL and in voxels.
SHAPE_Volume=iVi
where Vi correspond to the volume of voxel i of the Volume Of Interest.