10 CFR §35.432

1. (a)Before the first medical use of a brachytherapy source on or after October 24, 2002, a licensee shall have—
   1. (1)Determined the source output or activity using a dosimetry system that meets the requirements of § 35.630(a);
   2. (2)Determined source positioning accuracy within applicators; and
   3. (3)Used published protocols currently accepted by nationally recognized bodies to meet the requirements of paragraphs (a)(1) and (a)(2) of this section.
2. (b)Instead of a licensee making its own measurements as required in paragraph (a) of this section, the 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 in accordance with paragraph (a) of this section.
3. (c)A licensee shall mathematically correct the outputs or activities determined in paragraph (a) of this section for physical decay at intervals consistent with 1 percent physical decay.
4. (d)A licensee shall retain a record of each calibration in accordance with § 35.2432.