When cancer spreads to a limited number of new sites, that's called oligometastatic disease, and it can often be treated with targeted radiation rather than whole-body approaches alone. At 5D Cancer Services in St. George, the Akesis Gemini 360 system is capable of treating multiple metastatic sites — including brain metastases — in a single course of care, using daily imaging to keep each target precisely in view.
What Does "Oligometastatic" Mean?
Oligometastatic disease describes a state where cancer has spread beyond its original site, but only to a small, countable number of locations — rather than widespread, diffuse metastasis. This distinction matters clinically: a limited number of metastatic tumors may be candidates for direct, localized treatment aimed at each site, in addition to any other therapy a patient's oncology team has planned. Common sites include the lung, liver, and bone, and the same principle can apply to the brain.
Whether a given case qualifies as oligometastatic, and whether radiation is an appropriate part of the treatment plan, is a determination made by the treating physician based on imaging, pathology, and the patient's overall history. Patients considering this should talk with their oncology team about where their case fits. More background on the conditions treated at 5D Cancer Services is available on the conditions page.
Why Do Multiple Tumor Sites Need a Different Approach?
Treating several tumor sites, sometimes in different organs, raises the bar for precision. Each target needs its own dose plan, its own setup verification, and its own margin for daily anatomical changes — all without unnecessarily increasing the dose to healthy tissue in between. The Akesis Gemini 360 is built to handle this through simultaneous multi-target therapy, which allows more than one tumor site to be addressed within a coordinated treatment plan rather than as entirely separate courses.
Onboard cone-beam CT (CBCT) imaging is taken at each visit, so the treatment team can confirm the exact position and shape of each target before delivering dose. If a tumor has shifted slightly, or if surrounding anatomy has changed since the last scan, the plan can be adapted that same day. For a closer look at how this imaging process works, see the imaging page.
How Are Brain Metastases Treated With This System?
Brain metastases require especially tight precision, since the margin for error near critical brain structures is small. Daily imaging and adaptive planning are designed to keep the treatment beam focused tightly on the target while limiting dose to surrounding healthy brain tissue. The ability to adapt the plan at each session — rather than relying solely on a single plan created days or weeks earlier — is part of what makes this approach suited to small, well-defined targets like brain metastases.
As with any metastatic disease, the decision to pursue radiation for brain metastases, and the specific approach taken, is made in consultation with the patient's full care team, taking into account the number and location of lesions and the patient's overall treatment history.
What Should Patients Ask Their Care Team?
If a patient has been told they have oligometastatic disease or brain metastases, useful questions for their oncology team and the 5D Cancer Services treatment team include:
| Question | Why It Matters |
|---|---|
| How many sites are being considered for treatment? | Determines whether simultaneous multi-target therapy applies |
| How will each site be imaged and verified? | Clarifies the role of daily CBCT in the plan |
| How does this fit with other treatment I'm receiving? | Radiation for metastatic sites is typically coordinated with a patient's broader oncology care |
| What does a typical visit involve? | Helps set expectations for scheduling and time commitment |
More detail on the underlying technology and the reasoning behind an adaptive approach is available on the adaptive radiotherapy page and the why adaptive page. Patients in St. George and Southern Utah who have questions about whether their case may be a fit can review common questions on the FAQ page or reach out directly to discuss their specific situation with the treatment team.
This content is for informational purposes only and does not constitute medical advice. Please consult a qualified healthcare provider for guidance specific to your situation.