RICHLAND, Wash.--(BUSINESS WIRE)--The annual conference of the American Association of Physicists in Medicine (AAPM) in Minneapolis, Minn. July 22-26, 2007, was the venue for the unveiling of several scientific studies that presented evidence supporting the unique characteristics and advantages of Proxcelan™ brachytherapy seeds (Cesium-131 seeds) used in the treatment of prostate cancer and under research for other malignancies.