Hastaya özel kemik modellemesi ile bir halka fiksatör sisteminin simülasyonu

External ring fixators are widely used in orthopaedics for the purposes of fracture fixation, bone lengthening and deformity correction. In these fixators, the clinician typically brings the bone fragments to an anatomically desired position by changing the lengths of the rods connecting the fixator rings. This task is accomplished by the clinician based on experience and expertise. As an alternative, commercial systems exist where the same task is automatized with the help of an accompanying software that implements a mathematical model of the fixator. Proper visualization tools, that will allow the clinician to foresee the outcome of the treatment, are not present in the currently available software systems. In this thesis, we have developed methods to convert the model of a healthy bone, called the canonical model, to the patient-specific pathological (such as deformed) bone model. A graphical user interface (GUI) has been programmed with an advanced visualization and simulation tool that can automatically create the patient-specific bone model based on this approach. The bone modeling algorithm has been evaluated on a total of 19 different tibia and femur models and found to be effective. Furthermore, the visualization tool has been tested in the simulation of four orthopaedic procedures. In all examples, the visualization tool has provided a realistic depiction of the bone-fixator system and the treatment procedure. We believe that the developed GUI equipped with the visualization module could be a useful clinical tool where the clinician can visualize the applied treatment or evaluate different treatment scenarios a priori per patient.