Scout Dose of Resin Microspheres

This study looks at a liver cancer treatment called radioembolization and tests a new, possibly more accurate way to check if the treatment is safe for a patient's lungs. Radioembolization is a procedure where tiny beads containing a radioactive substance (yttrium-90) are injected into the arteries that feed a liver tumor. These beads lodge mainly in the tumor and deliver radiation directly to it, while sparing most of the normal liver. However, some of these beads can bypass the liver circulation and travel to the lungs. If too many reach the lungs, they can cause serious radiation damage called radiation pneumonitis. To avoid this, doctors currently perform a "test run" before the real treatment. They inject a different particle called MAA into the liver artery and then do nuclear medicine scans to see how much of it goes to the lungs versus the liver. This percentage is called the lung shunt fraction. If the lung shunt is 20% or higher, radioembolization is not done; if it is between 10% and 20%, the decision depends on tumor size. The actual treatment usually happens 1-2 weeks after this test. MAA particles are similar in size to the treatment beads but not identical; some are smaller. Because of this, MAA may slightly overestimate how much of the treatment dose would really go to the lungs. Also, MAA is fully imported and has had periods of supply problems worldwide. For these reasons, there is a need for another, more accurate and more reliable way to measure lung sh…

This description comes directly from the study's public registry record.

Hyo-Cheol Kim, MD  ·  82-10-5136-5205  ·  radioembolization@snu.ac.kr

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