Periodic spot-checks for teletherapy units.

CFR · 2024-01-01 · US · Title 10

(a) A licensee authorized to use teletherapy units for medical use shall perform output spot-checks on each teletherapy unit once in each calendar month that include determination of— (1) Timer accuracy, and timer linearity over the range of use; (2) On-off error; (3) The coincidence of the radiation field and the field indicated by the light beam localizing device; (4) The accuracy of all distance measuring and localization devices used for medical use; (5) The output for one typical set of operating conditions measured with the dosimetry system described in § 35.630(b); and (6) The difference between the measurement made in paragraph (a)(5) of this section and the anticipated output, expressed as a percentage of the anticipated output ( (b) A licensee shall perform measurements required by paragraph (a) of this section in accordance with written procedures established by the authorized medical physicist. That individual need not actually perform the spot-check measurements. (c) A licensee shall have the authorized medical physicist review the results of each spot-check within 15 days. The authorized medical physicist shall notify the licensee as soon as possible in writing of the results of each spot-check. (d) A licensee authorized to use a teletherapy unit for medical use shall perform safety spot-checks of each teletherapy facility once in each calendar month and after each source installation to assure proper operation of— (1) Electrical interlocks at each teletherapy r

official document · source cfr-2024 · id 10:§ 35.642