The technique, known as radioembolization or intra-arterial brachytherapy, uses the vascular system to deliver targeted treatment to the tumor. The tiny glass bubbles filled with radioactive material deliver high doses of tumor-killing radiation directly to the liver tumors.


Liver tumors use a supply of blood that is largely separate from the blood that nourishes normal liver tissue, so very few of the bubbles end up in the healthy liver.

The bubbles are smaller than the diameter of a human hair. The outpatient procedure takes about an hour to complete. The bubbles release over 10-14 days.

Patients may be candidates for this procedure if they are not able to get a liver transplant. Mayo Clinic radiation oncologists are now using this procedure.