OAR 333-106-0305
Additional Requirements for Radiographic Machines: Radiation Exposure Control Devices

(1)

Timers. Means shall be provided to terminate the exposure at a preset time interval, preset product of current and time, a preset number of pulses or a preset radiation exposure to the image receptor. In addition:

(a)

Termination of exposure shall cause automatic resetting of the timer to its initial setting or to zero;

(b)

It shall not be possible to make an exposure when the timer is set to a zero or “off” position if either position is provided.

(2)

X-ray Exposure Control:

(a)

An X-ray exposure control shall be incorporated into each X-ray system such that an exposure can be terminated by the operator at any time except for:

(A)

Exposure of 0.5 second or less; or

(B)

During serial radiography when means shall be provided to permit completion of any single exposure of the series in process.

(b)

Each X-ray exposure control shall be located in such a way as to meet the following requirements:

(A)

Stationary X-ray systems shall be required to have the X-ray exposure control permanently mounted in a protected area so that the operator is required to remain in that protected area during the entire exposure; and

(B)

The operator’s protected area shall provide visual indication of the patient during the X-ray procedure; and

(C)

Mobile and portable X-ray systems which are:
(i)
Used for greater than one week in the same location, i.e., a room or suite, shall meet the requirements of paragraph (2)(b)(A) of this rule;
(ii)
Used for greater than one hour and less than one week at the same location, i.e., a room or suite, shall meet the requirement of subparagraph (2)(b)(C)(i) of this rule or be provided with a 6.5 feet (1.98 m) high protective barrier which is placed at least 6 feet (1.83 m) from the tube housing assembly and at least 6 feet (1.83 m) from the patient; or
(iii)
Used to make an exposure(s) of a patient at the use location shall meet the requirement of subparagraph (2)(b)(C)(i) or (ii) of this rule or be provided with a method of X-ray control which permits the operator to be at least 12 feet (3.66 m) from the tube housing assembly during an exposure.

(c)

The X-ray control shall provide visual indication observable at or from the operator’s protected position whenever X-rays are produced. In addition, a signal audible to the operator shall indicate that the exposure has terminated.

(3)

Automatic Exposure Controls. When an automatic exposure control is provided:

(a)

Indication shall be made on the control panel when this mode of operation is selected;

(b)

If the X-ray tube potential is equal to or greater than 50 kVp, the minimum exposure time for field emission equipment rated for pulsed operation shall be equal to or less than a time interval equivalent to two pulses;

(c)

The minimum exposure time for all equipment other than that specified in subsection (3)(b) of this rule shall be equal to or less than 1⁄60 second or a time interval required to deliver 5 mAs, whichever is greater;

(d)

Either the product of peak X-ray tube potential, current, and exposure time shall be limited to not more than 60 kWs per exposure, or the product of X-ray tube current and exposure time shall be limited to not more than 600 mAs per exposure except that, when the X-ray tube potential is less than 50 kVp, the product of X-ray tube current and exposure time shall be limited to not more than 2000 mAs per exposure; and

(e)

A visible signal shall indicate when an exposure has been terminated at the limits required by subsection (3)(d) of this rule, and manual resetting shall be required before further automatically timed exposures can be made.

(4)

Reproducibility. With a timer setting of 0.5 seconds or less, the average exposure period (T) shall be greater than or equal to five times the maximum exposure period (Tmax) minus the minimum exposure period (Tmin) when four timer tests are performed: (T)> 5 (Tmax - Tmin).

Source: Rule 333-106-0305 — Additional Requirements for Radiographic Machines: Radiation Exposure Control Devices, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-106-0305.

333‑106‑0001
Purpose and Scope 333‑106‑0005
Definitions 333‑106‑0010
Administrative Controls 333‑106‑0015
General Requirements: Technique Chart 333‑106‑0020
General Requirements: Written Rules and Procedures 333‑106‑0025
General Requirements: Protection of Patients and Personnel 333‑106‑0035
General Requirements: Deliberate Exposures Restricted 333‑106‑0040
General Requirements: Patient Holding and Restraint 333‑106‑0045
General Requirements: Use of Best Procedures and Equipment 333‑106‑0050
General Requirements: Personnel Monitoring 333‑106‑0055
General Requirements: X-ray Operator Training 333‑106‑0060
General Requirements: Radiation Use and Safety Instructor Qualifications 333‑106‑0101
General Requirements: Diagnostic X-ray Systems 333‑106‑0105
General Requirements: Information and Maintenance Record and Associated Information 333‑106‑0110
General Requirements: Plan Review 333‑106‑0120
General Requirements: Information on Radiation Shielding for Plan Reviews — Optional 333‑106‑0130
General Requirements: Design Requirements for an Operator’s Booth 333‑106‑0201
Fluoroscopic X-ray Systems 333‑106‑0205
Fluoroscopic X-ray Systems Requirements: Activation of the Fluoroscopic Tube 333‑106‑0210
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Entrance Exposure Rates 333‑106‑0215
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Barrier Transmitted Radiation Rate Limits 333‑106‑0220
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Indication of Potential and Current 333‑106‑0225
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Source-to-Skin Distance 333‑106‑0230
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Timer 333‑106‑0235
Fluoroscopic X-ray Systems Requirements: Mobile Fluoroscopes 333‑106‑0240
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Control of Scattered Radiation 333‑106‑0245
Fluoroscopic X-ray Systems Requirements: Fluoroscopic Radiation Therapy Simulation Systems 333‑106‑0301
Additional Requirements for Radiographic Machines: Beam Limitation for Radiographic Systems Other Than Fluoroscopic, Dental Intraoral, Veterinary Systems, or Computed Tomography(CT) 333‑106‑0305
Additional Requirements for Radiographic Machines: Radiation Exposure Control Devices 333‑106‑0310
Additional Requirements for Radiographic Machines: Source-to-Skin Distance 333‑106‑0315
Additional Requirements for Radiographic Machines: Exposure Reproducibility 333‑106‑0320
Additional Requirements for Radiographic Machines: Radiation from Capacitor Energy Storage Equipment in Standby Status 333‑106‑0325
Additional Requirements for Radiographic Machines: Intraoral Dental Radiographic Systems 333‑106‑0345
Purpose and Scope 333‑106‑0350
Computed Tomography X-ray Systems: Definitions 333‑106‑0355
CT Equipment Requirements 333‑106‑0360
Computed Tomography X-ray Systems: Facility Design Requirements 333‑106‑0361
Computed Tomography X-ray Systems: Radiation Protection Surveys 333‑106‑0362
Computed Tomography X-ray Systems: Operating Procedures and Conditions of Operation 333‑106‑0363
Computed Tomography X-ray Systems: Quality Control Program 333‑106‑0364
Computed Tomography X-ray Systems: Initial and Annual Qualified CT Medical Physicist Scanner Performance Evaluations 333‑106‑0366
Computed Tomography X-ray Systems: Dose Limits 333‑106‑0367
Computed Tomography X-ray Systems: Records and Report Retention 333‑106‑0368
Computed Tomography X-ray Systems: Qualified CT Medical Physicist 333‑106‑0369
Computed Tomography X-ray Systems: Report and Notification of a CT Medical Event 333‑106‑0370
Computed Tomography X-ray Systems: Operator Requirements 333‑106‑0601
Veterinary X-ray Systems: Veterinary Medicine Radiographic Installations Additional Requirements 333‑106‑0700
Mammography Requirements: Mammography X-Ray Systems Definitions 333‑106‑0710
Mammography Requirements: Equipment Standards 333‑106‑0720
Mammography Requirements: Quality Assurance Program 333‑106‑0730
Mammography Requirements: Additional Requirements 333‑106‑0735
Mammography Requirements: Breast Density Notification 333‑106‑0750
Mammography Requirements: Mammography Personnel Qualifications
Last Updated

Jun. 8, 2021

Rule 333-106-0305’s source at or​.us