Theragenics Corporation, a wholly owned subsidiary of Juniper Investment Company, LLC following its merger in October 2013, develops and manufactures therapeutic radiological devices used to treat cancer. The company's products are used in brachytherapy, in which a physician introduces short-range, short-lived radioactive material directly into cancerous tissues, thereby concentrating the impact of the radiation on the tissue to be destroyed while limiting the effect on surrounding healthy tissues. The company's TheraSeed product is a radioactive implant used to treat localized tumors. Its TheraSphere product is used to treat liver cancer. Theragenics's products are most effective on encapsulated, confined tumors.