The Mixed Reality Viewer is an advanced visualization platform that transforms patient imaging data into hyper-realistic 3D models within an immersive mixed reality environment. Integrated with Brainlab Elements and powered by spatial computing hardware, it enables clinicians to interact with anatomical structures, zoom, rotate, and even walk through patient-specific models. The system enhances surgical planning, collaboration, and education through multi-user access and real-time interaction. With features like automatic segmentation, intuitive controls, and seamless PACS integration, it provides deeper anatomical insight and improves precision in complex surgical decision-making.