Stryker Leibinger GmbH & Co KG, a Freiburg, Germany subsidiary of Kalamazoo based Stryker (the most pleasant name in the business), is responsible for the development and manufacture of this cool ENT navigation system, called iNtellect. 
Many of our readers have probably seen Stryker’s navigation systems commonly used for total knee replacements. The ENT system is not only significantly more complex, it has to be more intuitive, as the cranial anatomy with all its sinuses, and nerves, and arteries and veins, is much more intricate.
The system’s navigation coordinates are provided by the Patient Registration Mask, a device that was just recently given the 2008 Medical Design Excellence Award.
More from the product page:
The software is the critical link between the Navigation System and the surgeon performing computer assisted Sinus surgery and other ENT procedures. The iNtellect ENT Navigation software is the result of years of experience that Stryker software engineers have in creating surgical planning software with familiar, easy-to-use interfaces.
Key advantages include:
Precise Smart instrumentation Available laptop navigation system and optional planning station Unique perspective view to see 3-D image of patient anatomy Advanced auto segmentation capabilities for tumors, skin, brain, vasculature, ventricle and other volumes of interest Advanced features such as automatic image fusion between multiple CT, MR, CTA, MRA, fMRI,and PET images by one mouse click Fully automated registration Stryker camera technology
To learn more, check out this product brochure (.pdf) or head to the product page…