Graphical user interface for a surgical navigation system and method for providing an augmented reality image during operation

A method for providing an augmented reality image during an operation, comprising:

• providing a 3D display system with a see-through visor;
• providing a tracking system comprising means for real-time tracking of:
• a surgeon's head, the 3D see-through visor, a patient anatomy and a surgical instrument to provide current position and orientation data;
• providing a source of:
• an operative plan, a patient anatomy data and a virtual surgical instrument model;
• generating, by a surgical navigation image generator, a surgical navigation image comprising:
• a three-dimensional image representing simultaneously a virtual image of the surgical instrument corresponding to the current position and orientation of the surgical instrument and a virtual image of the surgical instrument indicating the suggested positions and orientations of the surgical instruments according to the operative plan based on the current relative position and orientation of the surgeon's head, the see-through visor, the patient anatomy and the surgical instrument;
• showing the surgical navigation image at the see-through visor, such that an augmented reality image collocated with the patient anatomy in the surgical field underneath the see-through visor is visible to a viewer looking from above the see-through visor towards the surgical field,
• wherein the 3D display system comprises a 3D projector, a plurality of opaque mirrors, an opaque projection screen and a see-through mirror, wherein the 3D projector is configured to project the surgical navigation image towards the plurality of opaque mirrors for reflecting the surgical navigation image towards the opaque projection screen for showing the surgical navigation image for emission towards the see-through mirror, which is partially transparent and partially reflective.