Imaging techniques are still developing rapidly, and the increasing speed of computers is making demanding postprocessing functions possible. A modern feature often available on recent CT and MRI consoles is the ability to generate 3D surface models from a series of cross-sectional images. However, the function of the 3D models is often restricted to display only and so far the applications for further manipulation of the 3D models have been limited. The described method for 3D bone angle quantification provides a computational goniometer based on 3D models for angular measurements on individual femora. The 3D goniometer tool is easy and intuitive to handle. It was possible to show that such 3D systems provide good angular measurements.
In preparation for a correctional osteotomy the crucial angles are measured on antero-posterior and so-called
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