Modern Bt Techniques - Florence 2016
Seeds with 131 Cs Radioactive Isotope
• 131 Cs isotope was suggested for BRT use back in 1960s (Henschke & Lawrence 1965)
• Based on Invention made by Donald C. Lawrence in 1967
• Developed by IsoRay, Inc. (Richland, WA, USA)
• Received FDA 510(k) clearance in 2003
• In 2009 FDA clearance for head & neck, lung and other sites (Proxcelan™ 131 Cs Brachytherapy Seeds)
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