Model-based geometric calibration for medical x-ray systems.

Purpose: Currently applied calibration approaches lead to satisfying 3D roadmapping overlay and 3D reconstruction accuracies; however, the required calibration times are extensive. The aim of this paper is the introduction of a novel model-based approach for geometric system calibrations, leading to a significant reduction of calibration times.

Methods: By using physical insight into the system, a physical model is derived which can be exploited to predict geometric calibrations parameters.