What both platforms have in common
Both the Gemini 360 and MR-Linac are linear accelerators with on-board imaging that allow for adaptive radiotherapy: imaging at every session, with the option to re-plan based on anatomy of the day. Both can deliver SBRT, both are FDA-cleared, and both are used at major academic centers around the world.
Both also represent a meaningful step beyond traditional radiation systems that lock a single plan in at the start of treatment and never update it.
How they differ
- Imaging modality: Gemini 360 uses on-board CT-based image guidance; MR-Linac uses real-time MRI
- Daily workflow: Gemini 360 uses an AI-assisted CT-driven adaptive workflow; MR-Linac uses MRI-based on-table re-planning
- Session time: Gemini 360 sessions are typically 30–45 minutes; MR-Linac sessions often 45–90 minutes
- Magnetic-field considerations: MR-Linac patients must be MRI-compatible (no certain implants, no claustrophobia issues); Gemini 360 has no such restriction
- Contrast: Gemini 360 imaging does not typically require gadolinium contrast
- Range of indications on one platform: Gemini 360 supports SBRT, SRS, SFRT, and low-dose benign RT
Where MR-Linac shines
MR-Linac platforms have an advantage when soft-tissue motion needs to be visualized in real time during the radiation beam — for example, gating around respiratory motion in some upper-abdomen cases. Centers that have invested in MR-Linac often use it for difficult pancreatic and liver cases.
Where the Gemini 360 shines
The Gemini 360 is designed around speed, breadth, and a clean adaptive workflow. Sessions are shorter, the platform supports the full spectrum of techniques (SBRT, SRS, SFRT, low-dose benign RT) on a single machine, and patients with implants or claustrophobia who can't tolerate an MR-Linac can still receive adaptive treatment.
Which is right for me?
For the vast majority of indications either modern adaptive platform delivers excellent results. The right answer depends on your diagnosis, anatomy, prior treatment, implants, comfort with MRI, and travel logistics. We're happy to talk through the trade-offs in your specific case — call (435) 900-7060 or visit /faq for our most common patient questions.
