Some large liver tumors can be treated in a manner similar to a chemo embolization. However, the injected spheres do not contain chemotherapy but radioactivity. As a result, the tumor is irradiated from the inside, as it were. As with chemo embolization, radio embolization is a percutaneous procedure, in which the radiologist of the Liver Center inserts a catheter through the groin or wrist until just in front of the liver tumor. Because radioactive spheres do their work for a long time, it is important that these spheres end up in exactly the right place in the liver tumor. That is why a test treatment will first take place to see whether the spheres can be placed in the right place and then the final treatment will take place two weeks later. Usually two treatments are needed. This treatment can also be used as a bridge to a liver transplant.