GratXray needed a reliable way to demonstrate its next-generation breast CT scanner without transporting hardware to hospitals and medical conferences. The goal was simple and critical: let doctors see the device in full size, understand its motion paths, and evaluate clinical workflow — without guessing, lag, or visual gimmicks. We built a Mixed Reality solution for Meta Quest 3 and a synchronized companion tablet app so clinicians can walk around the system, observe real-world occlusion, and watch CT and tomosynthesis animations triggered in real time by a presenter. The system had to work offline, run at 90–120 FPS, hold pose accuracy across multiple headsets, and operate in kiosk-safe environments. Result: a stable, hospital-ready MR platform that communicates GratXray’s technology clearly and reduces travel and setup effort for physical devices.