Interoperative Guidance via Medical Augmented Reality

For the NARVIS project two critical stages of minimal invasive spinal trauma surgery have been identi ed that can be improved with advanced visualization of imaging data. The stages port placement and pedicle screw placement require anatomical imaging data in order give the surgeon su cient information for performing his task. Port placement is a very early stage of the procedure that determines the access to the operation site and the course of the whole surgery. To allow the surgeon for an optimal access to the operation site we want to provide an intuitive guidance making him nd adequate places of the ports. Pedicle screw placement is one of the critical parts of the surgery since their alignment and position decides on success outcome of the surgery to stabilize the spine without harming surrounding tissue. For both stages 3D guidance of surgical instruments can support the surgeon. The aim of the guidance can either be guiding to a certain position and orientation of the instrument or avoiding critical anatomical structure during the procedure. The guidance will be achieved by in-situ visualization with a head mounted display (HMD) and visualization of preoperative CT data and intraoperative imaging data.