MedNeuro3D NeuroVista is a first-of-its-kind AI-assisted 3D neuro-oncology platform that turns scattered brain images into one shared clinical case for clinicians, patients, and families. In brain tumor care, clinicians must mentally reconstruct the relationships among tumor, vessels, and neural pathways from dozens of 2D slices, while patients and families struggle to understand what is affected and what must be protected. NeuroVista assembles multimodal MRI and CT into a single interactive 3D case, connecting pre-operative review, post-operative comparison, and remote consultation within one continuous context. Clinicians receive a detailed view in which every finding can be traced back to the source images; patients receive a simplified view they can actually follow. Running in a standard browser with no dedicated workstation, it fits existing PACS workflows. AI does not replace clinical judgment. NeuroVista exists so that the clinician's explanation becomes clearer and the patient's questions and choices are better respected.