With Cappa C-Nav, Siemens Healthcare offers an optical navigation system that is especially suitable for spinal as well as trauma surgery. In spinal surgery for example the new method helps to accurately position pedicle screws in the spine; in orthopedics navigation technology is used to support online visualization during stabilization of degenerated bones. Prior to the operation, the surgeon creates a 3D X-ray data set of the region of interest. This data set is used like a map for orientation during surgical intervention. The surgeon navigates during the operation by using so-called optical tracking via a special stereo camera. Additionally, the method also minimizes radiation exposure to the patient as well as the OR staff.