@nhsusanne, here's an explanation of Y-90 radioembolization from Mayo Clinic
"Radioembolization is a type of transarterial therapy that strategically attacks liver tumors with localized, high doses of radiation. The treatment often is called Y-90. This refers to the radioactive isotope yttrium-90 that is inserted into tiny glass beads and injected into the tumor's blood supply. The radioactive beads accumulate inside the tumors and emit radiation to suppress tumor growth. Over time, the tumor dies, but the healthy part of the liver remains unaffected.

Y-90 is a targeted way to deliver radiation to a tumor because it radiates less than half an inch into adjacent tissues. This limits the amount of the liver exposed to radiation, and spares normal liver tissue and other nearby organs from unnecessary exposure."
Read more here: https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/targeted-radiation-therapy

If you are having to travel for radiation using specialized equipment, you may be having proton beam therapy. Proton therapy has several advantages over traditional radiation therapy in treating liver cancer.

Do you know what type of treatment you will be receiving?