The PHACON Sinus Patient “Schulze” is based on a CT-data and offers a realistic surgery simulation as it consists of highly detailed anatomical structures and landmarks, e.g. Processus uncinatus or the Bulla ethmoidalis. As a special anatomical property this patient has a low-lying skull base. The simulation can be enhanced by the automatic detection of injuries on the model in the related navigation system. The PHACON Sinus Trainer offers a combination of an artificial specimen (PHACON Sinus Patient) and virtual assistance (PHACON Sinus Trainer) with the original patient CT-data.