  Fully immersive virtual reality (VR) has the potential to improve
neurosurgical planning. For example, it may offer 3D visualizations of relevant
anatomical structures with complex shapes, such as blood vessels and tumors.
However, there is a lack of research tools specifically tailored for this area.
We present a research framework for VR neurosurgery based on open-source tools
and preliminary evaluation results. We showcase the potential of such a
framework using clinical data of two patients and research data of one subject.
As a first step toward practical evaluations, two certified senior
neurosurgeons positively assessed the usefulness of the VR visualizations using
head-mounted displays. The methods and findings described in our study thus
provide a foundation for research and development aiming at versatile and
user-friendly VR tools for improving neurosurgical planning and training.
