Abstract: The present disclosure describes a four plane x-ray inspection system for inspecting objects present within containers to be transported and for identifying and distinguishing objects constituting weapons, explosives, bombs, materials, chemicals, drugs, substances, and other items that may cause harm to humans, vehicles, and property. The system uses four, multi-energy level, x-ray scanning planes, including two, multi-energy level, x-ray scanning planes configured at angles, in a scanning tunnel to generate ultra-high definition imaging data and metadata corresponding to dimensionally accurate front, top and side orthogonal views of a target object that may comprise a threat. The system also provides orthogonal views of such target objects and identifies them through the calculation of accurate effective atomic numbers and densities. Through use of the angled, multi-energy level, x-ray scanning planes, the system increases the probability of detecting threats while reducing the probability of false alarms.