The ct struct

The ct structure contains the 3D-CT-cube (cube), obtained from the planning-CT, and the voxel resolution (resolution).

Screenshot of the ct-struct:

## ct.cube The cube is a N_x × N_y × N_z -matrix (_N_x,y,z = number of voxels in x-,y-,z-direction_) containing the water equivalent thickness of each voxel. We already translate HU to water equivalent electron density according to a look up table upon patient data import. ## ct.resolution The resolution specifies the size of each voxel in x-, y-, and z-direction in [mm].