Non-rigid registration and geometric approach for tracking in neurosurgery

Registration of points obtained from preoperative 3D model and points of intraoperative stereo 3D representation, as well as tracking of surgical devices are two important stages in computer aided surgery (CAS). This work shows the application and comparison of two different methods (RPM and ICP) in the registration process of patient´s head markers, as well as the use of geometric methods to track the surgical device in real time.