Michigan Administrative Code › Department - Labor and Economic Opportunity › MIOSHA › X-Ray Machine Registration › Ionizing Radiation Rules Governing the Use of Radiation Machines › Part 7 - MEDICAL X-RAY INSTALLATIONS › THERAPEUTIC MACHINES OPERATED ABOVE 85 KVP › Section R. 333.5317 - Conditions of operation

Current through Vol. 24-12, July 15, 2024
Rule 317.
(1)
						An installation shall be operated in compliance with all limitations determined
						necessary and specified in writing by the department.
(2) The output of the x-ray generator shall
						be calibrated before use for the treatment of patients for each technique or
						condition of use. The department shall be informed by telephone or in writing
						of completion of initial calibration before patient treatment is initiated. A
						written report of this initial calibration shall be submitted within 30 days to
						the department. Recalibration shall be required after each tube replacement and
						after any changes or replacement in the generating apparatus which could affect
						a change in the x-ray output. Check calibrations shall be made on an annual
						basis and records of all calibration maintained for not less than 7
						years.
(3) X-ray therapy equipment
						capable of operating above 150 kVp shall not be operated routinely until the
						radiation safety of the installation has been established by a protection
						survey conducted pursuant to R 333.5063. The department shall be informed by
						telephone or in writing of completion of the initial survey before patient
						treatment is initiated. A written report of this initial survey shall be
						submitted within 30 days to the department. All x-ray therapy equipment shall
						be operated in conformance with recommendations of the protection
						survey.
(4) Both the control panel
						and the patient shall be observable during exposure.
(5) When a patient must be held in position
						for radiation therapy, mechanical supporting or restraining devices should be
						used. If the patient must be held by an individual, upon approval by the
						radiologist in charge followed by written notice to the department, that
						individual shall be provided protection equivalent to 7 half-value layers and
						shall be positioned so that no part of his or her body can be struck by the
						useful beam and is as far as possible from the edge of the useful beam. The
						exposure of an individual used for this purpose shall be monitored and a
						permanent record maintained. The individual selected for this purpose shall not
						otherwise be occupationally exposed to ionizing radiation.
(6) With the exception of subrule (5) of this
						rule, an individual other than the patient shall not be permitted in the
						treatment room when the tube is operated at potentials exceeding 85 kVp. At
						potentials of 85 kVp or below, other individuals may be permitted in the
						treatment room by the radiologist in charge if they are essential to conduct
						the treatment, but only if they are protected as specified in subrule (5) of
						this rule and their radiation exposure is monitored and permanently
						recorded.
(7) Personnel monitoring
						shall be performed in controlled areas for each individual occupationally
						exposed to ionizing radiation from therapeutic x-ray equipment. Individual
						monitoring devices, such as film badge dosimeters or thermoluminescent
						dosimeters, shall be permanently assigned to each occupationally exposed
						individual. This monitoring shall be continuous during employment as a
						radiation worker.
(8) Personnel
						exposure records shall be kept on permanent available file at the facility
						where the exposure occurs.
(9)
						Monitoring devices used to estimate whole body exposure shall normally be worn
						on the chest or abdomen. Monitoring of other body parts shall comply with R
						333.5065.
(10) Monitoring devices
						worn to estimate personnel occupational exposure shall not be worn by the
						individual when he or she is exposed as a patient for a medical or dental
						reason.
(11) Lead, lead rubber,
						lead foil, and similar materials used for limiting the field shall not transmit
						more than 5% of the useful beam under the conditions at which the machine is
						operated for therapy. This subrule does not apply to treatment blocks used to
						adjust or modify the intended radiation dose to the area of
						treatment.
(12) A therapeutic x-ray
						system shall not be left unattended without locking the apparatus, room, or
						building in some manner which prevents use of the apparatus by unauthorized
						persons.