Isoray Inc. (Isoray) is a national isotope-based medical company and the sole producer of Cesium brachytherapy sources, which are expanding brachytherapy treatments for difficult to treat cancers.^[1] Isoray is a registered manufacturer with the FDA and holds multiple 510(k) clearances for brachytherapy devices. The brachytherapy isotopes are sold under the brandname Blu.^[2]

The company went public in 2005.^[3] Isoray’s corporate headquarters is located at 350 Hills Street, Suite 106, Richland WA 99354.^[3]

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