GPU-based smart visibility techniques for tumor surgery planning.

Purpose: The rating of distances and infiltrations to vital structures is important for the planning of tumor surgery or interventional procedures. To support such an assessment, the target structures should be clearly emphasized in a 3D visualization by ensuring their visibility.

Methods: Smart Visibility techniques such as Ghosting Views and Breakaway Views are employed.

Sinus endoscopy--application of advanced GPU volume rendering for virtual endoscopy.

For difficult cases in endoscopic sinus surgery, a careful planning of the intervention is necessary. Due to the reduced field of view during the intervention, the surgeons have less information about the surrounding structures in the working area compared to open surgery. Virtual endoscopy enables the visualization of the operating field and additional information, such as risk structures (e.