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§ 35.432 - Calibration measurements of brachytherapy sources.

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Before the first medical use of a brachytherapy source on or after October 24, 2002, a licensee shall have—

Determined the source output or activity using a dosimetry system that meets the requirements of § 35.630(a);

Determined source positioning accuracy within applicators; and

Used published protocols currently accepted by nationally recognized bodies to meet the requirements of paragraphs (a)(1) and (a)(2) of this section.

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.

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.

A licensee shall retain a record of each calibration in accordance with § 35.2432.

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§ 35.415 - Safety precautions.
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§ 35.433 - Decay of strontium-90 sources for ophthalmic treatments.