BRACHYTHERAPY; CALIBRATION MEASUREMENTS

A. Before the first medical use of a brachytherapy source, a licensee must have: (1) determined the source output or activity using a dosimetry system that meets the requirements of part 4731.4468 , subpart 1; (2) determined source positioning accuracy within applicators; and (3) used published protocols currently accepted by nationally recognized bodies to meet the requirements of this item. B. A licensee may use measurements provided by the source manufacturer or by a calibration laboratory accredited by the American Association of Physicists in Medicine that are made according to item A. C. A licensee must mathematically correct the outputs or activities determined under item A for physical decay at intervals consistent with one percent physical decay. D. A licensee must retain a record of each calibration according to part 4731.4513 .