Mobile surgical tracking system with an integrated fiducial marker for image guided interventions

A mobile surgical tracking system comprising a shadow imaging device, a mobile surgical tracking device configured to be mounted on an anatomical structure, an integrated fiducial marker and an integrated optical tracking system, wherein the mobile surgical tracking device includes the shadow imaging device comprising an image sensor and a shadow mask, wherein the shadow imaging device is configured to generate an image of a patient's anatomical structure, the mobile surgical tracking system further comprising a mobile tracking system coordinate frame, wherein the integrated fiducial marker has a position which has a known relation to the mobile tracking system coordinate frame fora direct registration of the image to a coordinate system of the mobile surgical tracking device wherein an instrument can be tracked and visualized by a visualization element in an image space once the relation from the image to the coordinate frame of the mobile surgical tracking device is known, wherein the instrument comprises an optical marker of at least four LEDs.