We have described an image-guided neurosurgery system, now in use in the operating room. The system achieves high positional accuracy with a simple, efficient interface that interferes little with normal operating room procedures, while supporting a wide range of cases. Qualitative assessment of the system in the operating room indicates strong potential. In addition to performing quantitative testing on the system, we are also extending its capabilities by integrating a screw-based head tracking system and improved visualization capabilities.

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