Obtaining of personalized CAD models of the cortical and trabecular surfaces of a human femur starting from tomographic images

Abstract

The anatomical structures formed by hard and soft tissues, are represented by complex geometries, in which studies is not possible simplifications generally overestimate the stiffness of structures. Therefore, we have developed various techniques for reconstruction into three dimensional (3D) anatomical complex geometries. The present investigation has for objective to process a set of tomographic images of a human femur to obtain the same CAD 3D models of cortical and trabecular parts. In order to achieve the objective ensued a group of logical steps and it helped of a biomodels software where the images they were imported and then redefine the edge of the image that is going to work and create these surfaces by the Hounsfield scale were imported, scale measuring humidity and present density in the bones and muscles. The cortical and trabecular parts of the femur differ in their mechanical properties and when carrying out further studies on the biomechanical behavior of the bone, the insertion of implants or fracture analysis can be closer to reality results if a model is obtained 3D thereof. Finally the obtained files with an extension of graphic exchange for a design software CAD where they became workable solids were exported