Project

Interactive radiotherapy room

A real radiation therapy treatment room, scanned in 3D and navigable in your browser.

Meet Lili, the doctor who welcomes you, walks you through the room and answers your questions about radiation therapy, in English and in French.

Rotate the view by holding left-click and dragging. Move with W A S D or arrow keys. Press Space to go up, Shift to go down. Click the buttons on the left to frame a specific element, or activate Lili and ask her out loud "show me the Halcyon".

Why

Many patients enter a radiation therapy room without ever having seen one before. The environment is intimidating, the machine impressive, the vocabulary opaque. Being able to virtually step into the room before their first session, at their own pace, with someone who answers their questions — that changes the relationship with care.

The machine

This room houses a Halcyon linear accelerator (Varian). Unlike traditional linacs where the gantry visibly rotates around the patient, the Halcyon has its entire mechanism enclosed inside a white cylindrical shell that looks like a CT scanner. The patient sees no moving mechanical parts, which makes the experience significantly less intimidating.

For whom

For patients and their loved ones who want to demystify a journey that often starts in the dark. For healthcare professionals who want a visual presentation tool. For anyone curious about what immersive healthcare could become, tomorrow.

How it's built

• Real 3D capture with the XGRIDS Portal spatial scanner (LiDAR + 4 cameras + IMU).
• 3D Gaussian Splatting reconstruction with LCC Studio.
• Editing and compression in SuperSplat.
• Hosted on Cloudflare R2 + CDN.
• Real-time browser rendering via Three.js + SparkJS.
• Lili avatar: VRM (VRoid Studio), three-vrm for animation.
• Lili voice: ElevenLabs Conversational AI, function-calling to drive the camera.

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