RICHLAND, Wash.--(BUSINESS WIRE)--IsoRay, Inc. (Amex: ISR) said today that a growing number of hospitals and medical treatment centers are adopting its proprietary mesh Cesium-131 (Cs-131) brachytherapy seeds (internal radiation therapy) for use in conjunction with the da Vinci® Surgical System to treat early stage lung cancer patients. One of the most recent adopters is Georgia’s Archbold Memorial Hospital.