Patent ID: 8314811

Claim:
In a non-transitory computer readable storage medium having stored therein data representing instructions executable by a programmed processor for MIP-map processing of an anisotropic dataset to initially construct a set of MIP-maps at different resolutions, the storage medium comprising instructions for: reducing, as part of originally creating the set of the MIP-maps to be stored, a number of voxels along at least one axis by a first factor other than a power of two, wherein the one axis comprises a first major axis relative to the anisotropic dataset; making the created, stored MIP-maps available for use after the creation, reducing along at least a second major axis relative to the anisotropic data set by a second factor of a power of two; and calculating the first factor as a function of the second factor, a voxel size along the first major axis, and a minimum voxel size along the first, second and a third major axes.