Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4732 - IONIZING RADIATION
RADIATION THERAPEUTIC REQUIREMENTS
Part 4732.0925 - GENERAL REQUIREMENTS FOR THERAPEUTIC EQUIPMENT
Universal Citation: MN Rules 4732.0925
Current through Register Vol. 48, No. 39, March 25, 2024
Subpart 1. Protection radiation survey measurements.
A. The registrant must
ensure that facility radiation surveys required by part
4732.0380, subpart 4, are
performed with the therapeutic radiation machine in a "BEAM-ON" condition, with
the largest clinically available treatment field and with a scattering phantom
in the useful beam of radiation.
B.
The registrant must ensure that equipment quality control measurements are
performed at intervals not to exceed 12 months.
Subp. 2. Dosimetry equipment.
A. The registrant must have a calibrated
dosimetry system available for quality control measurements. The system must be
calibrated by the National Institute for Standards and Technology (NIST) or by
an American Association of Physicists in Medicine (AAPM) Accredited Dosimetry
Calibration Laboratory (ADCL). The calibration must have been performed within
the previous 24 months and after any servicing that may have affected system
calibration.
(1) For beams with energies
greater than one MV (one MeV), the dosimetry system must have been calibrated
for Cobalt-60.
(2) For beams with
energies equal to or less than one MV (one MeV), the dosimetry system must have
been calibrated at an energy (energy range) appropriate for the radiation being
measured.
B. The
dosimetry system may be compared with a system that has been calibrated
according to this subpart. This comparison must have been performed within the
previous 12 months and after each servicing that may have affected system
calibration. The quality control check system may be the same system used to
meet the requirements in this subpart.
C. The registrant must maintain a record of
each dosimetry system calibration, intercomparison, and comparison for the
duration of the license or registration. For each calibration, intercomparison,
or comparison, the record must include:
(1)
the date;
(2) the model numbers and
serial numbers of the instruments that were calibrated, intercompared, or
compared;
(3) the correction
factors that were determined;
(4)
the names of the individuals who performed the calibration, intercomparison, or
comparison; and
(5) evidence that
the intercomparison was performed by, or under the direct supervision and in
the physical presence of, a therapeutic radiological physicist.
Subp. 3. Reports of external beam radiation therapy surveys and measurements.
The registrant of any therapeutic accelerator must maintain the records according to part 4732.0330.
Statutory Authority: MS s 144.12
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