SPOT CHECK RECORDS; TELETHERAPY UNITS

A. A licensee must retain a record of each periodic spot check for teletherapy units required under part 4731.4472 for three years. The record must include: (1) the date of the spot check; (2) the unit manufacturer's name; (3) the model number and serial number for the teletherapy unit; (4) the model number, serial number, and identity of the source; (5) instruments used to measure the output of the teletherapy unit; (6) an assessment of time linearity and constancy; (7) the calculated on-off error; (8) a determination of the coincidence of the radiation field and the field indicated by the light beam localizing device; (9) the determined accuracy of each distance measuring and localization device; (10) the difference between the anticipated output and the measured output; (11) notations indicating the operability of each entrance door electrical interlock, electrical or mechanical stop, source exposure indicator light, and viewing and intercom system and doors; (12) the name of the individual who performed the periodic spot check; and (13) the signature of the authorized medical physicist who reviewed the record of the spot check. B. A licensee must retain a copy of the procedures required under part 4731.4472 , subpart 2, until the licensee no longer possesses the teletherapy unit.