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Oak Ridge Today
By the People, for the People
Oak Ridge National Lab Vital to Isotope Production for Medical Treatments
ORNL supplies over 300 isotopes used in cancer therapies, diagnostics, and more
Published on Mar. 4, 2026
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The Department of Energy's Oak Ridge National Laboratory (ORNL) is a crucial hub for the production of medical radioisotopes and stable isotopes used in a variety of clinical applications, from cancer treatments to lung imaging. ORNL has been supplying these vital isotopes for nearly 80 years, including in-demand radioisotopes like actinium-225, actinium-227, lead-212, thorium-228, and radium-226, as well as the stable isotope xenon-129 for lung imaging.
Why it matters
ORNL's isotope production capabilities are essential to supporting the development of new and innovative medical treatments, particularly in the growing field of targeted alpha therapy for cancer. As demand for these specialized isotopes increases, ORNL's role as a reliable domestic supplier becomes increasingly important for the U.S. healthcare system.
The details
ORNL produces over 300 different isotopes that are used by researchers, pharmaceutical companies, and medical providers. Some key isotopes supplied by ORNL include actinium-225 for targeted alpha therapy, actinium-227 which decays into radium-223 (used in an FDA-approved prostate cancer treatment), lead-212 and bismuth-212 for cancer diagnostics and therapies, thorium-228 which can be used as a generator for extracting decay products, and radium-226 which is recycled for use as a feedstock. ORNL also produces the stable isotope xenon-129, which can provide high-resolution lung imaging without ionizing radiation.
- ORNL has been producing medical isotopes for almost 80 years.
- Demand for specialized isotopes like actinium-225 and thorium-228 has been increasing in recent years as new cancer treatments are developed.
The players
Oak Ridge National Laboratory (ORNL)
A U.S. Department of Energy research facility that is a vital hub for the production of medical radioisotopes and stable isotopes used in a variety of clinical applications.
Department of Energy
The federal agency that oversees ORNL and supports its work in isotope production and other areas of scientific research.
What’s next
As demand for specialized medical isotopes continues to grow, ORNL will likely need to expand its production capabilities to meet the needs of researchers, pharmaceutical companies, and healthcare providers.
The takeaway
ORNL's role as a leading supplier of medical radioisotopes and stable isotopes is crucial for supporting the development of innovative cancer treatments and diagnostic tools. The lab's nearly 80-year history of isotope production has made it an indispensable resource for the U.S. healthcare system.


