1. A system for visualizing pulmonary fissures of a person's lungs comprising; a processor; software comprising instructions for the processor for creating a visual display comprising a two-dimensional model of the pulmonary fissures, wherein creating a visual display comprising the two-dimensional model of the pulmonary fissures comprises: accessing volumetric imaging data of the person's lungs; analyzing the volumetric imaging data to segment the lungs into lobes; using the segmented lobes, identifying locations at which pulmonary fissures should be present as the locations where the lobes abut each other; analyzing the volumetric images to identify locations at which pulmonary fissures are present as existing fissure; comparing the identified locations at which pulmonary fissures should be present to the identified locations at which pulmonary fissures are present to identify locations of missing fissure; and creating a visual display comprising the two-dimensional model of the pulmonary fissures comprising existing fissure portions and missing fissure portions, wherein the existing fissure portions are visually distinct from the missing fissure portions.