Minnesota Administrative Rules

4731.4519 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.

Statutory Authority:

MS s 144.1202; 144.1203

History:

29 SR 755

Published Electronically:

March 12, 2009