Vivos Inc., a radiation oncology medical device company, develops brachytherapy devices for the treatment of non-resectable tumors. It focuses on the development of yttrium-90 based RadioGel device, an injectable particle-gel for brachytherapy radiation treatment of cancerous tumors in people; and IsoPet for animals. The company was formerly known as Advanced Medical Isotope Corporation and changed its name to Vivos Inc. in December 2017. Vivos Inc. was incorporated in 1994 is headquartered in Richland, Washington.