OAR 333-106-0301
Additional Requirements for Radiographic Machines: Beam Limitation for Radiographic Systems Other Than Fluoroscopic, Dental Intraoral, Veterinary Systems, or Computed Tomography(CT)

(1)

The useful beam shall be limited to the area of clinical interest.

(2)

General Purpose Stationary and Mobile X-ray Systems:

(a)

There shall be provided a means for stepless adjustment of the size of the X-ray field, where the adjustment of each dimension of the field is independent of the other;

(b)

A method shall be provided for visually defining the perimeter of the X-ray field. The total misalignment of the edges of the visually defined field with the respective edges of the X-ray field along either the length or width of the visually defined field shall not exceed two percent of the distance from the source to the center of the visually defined field when the surface upon which it appears is perpendicular to the axis of the X-ray beam;

(c)

Evidence of compliance with subsections (2)(a) and (b) of this rule shall be shown on each radiograph taken, either by imaging part of the collimator on the radiograph or by imaging collimator nubs or pointers;

(d)

Beam-defining lights used for visually defining perimeters of the X-ray field shall have an illumination great enough to be visualized by the operator under ambient light conditions;

(e)

The Authority may grant an exemption on noncertified X-ray systems to subsections (2)(a) and (b) of this rule provided the registrant makes a written application for such exemption and in that application:

(A)

Demonstrates it is impractical to comply with subsections (2)(a) and (b) of this rule; and

(B)

The purpose of subsections (2)(a) and (b) of this rule will be met by other methods.

(3)

In addition to the requirements of section (2) of this rule, all stationary general purpose X-ray systems shall meet the following requirements:

(a)

A method shall be provided to indicate when the axis of the X-ray beam is perpendicular to the plane of the image receptor, to align the center of the X-ray field with respect to the center of the image receptor to within two percent of the SID, and to indicate the SID to within two percent;

(b)

The beam-limiting device shall indicate numerically the field size in the plane of the image receptor to which it is adjusted; and

(c)

Indication of field size dimensions and SID’s shall be specified in inches or centimeters, and shall be such that aperture adjustments result in X-ray field dimensions in the plane of the image receptor which correspond to those indicated by the beam-limiting device to within two percent of the SID when the beam axis is indicated to be perpendicular to the plane of the image receptor.

(4)

Radiographic equipment designed for only one image receptor size at a fixed SID shall be provided with means to limit the field at the plane of the image receptor to dimensions no greater than those of the image receptor, and to align the center of the X-ray field with the center of the image receptor to within two percent of the SID, or shall be provided with means to both size and align the X-ray field such that the X-ray field at the plane of the image receptor does not extend beyond any edge of the image receptor.

(5)

Special Purpose X-ray Systems:

(a)

Means shall be provided to limit the X-ray field in the plane of the image receptor so that such field does not exceed each dimension of the image receptor by more than two percent of the SID when the axis of the X-ray beam is perpendicular to the plane of the image receptor;

(b)

Means shall be provided to align the center of the X-ray field with the center of the image receptor to within two percent of the SID, or means shall be provided to both size and align the X-ray field such that the X-ray field at the plane of the image receptor does not extend beyond any edge of the image receptor. Compliance shall be determined with the axis of the X-ray beam perpendicular to the plane of the image receptor;

(c)

Subsections (5)(a) and (b) of this rule may be met with a system that meets the requirements for a general purpose X-ray system as specified in section (2) of this rule or, when alignment means are also provided, may be met with either:

(A)

An assortment of removable, fixed-aperture, beam-limiting devices sufficient to meet the requirement for each combination of image receptor size and SID for which the unit is designed with each such device having clear and permanent markings to indicate the image receptor size and SID for which it is designed; or

(B)

A beam-limiting device having multiple fixed apertures sufficient to meet the requirement for each combination of image receptor size and SID for which the unit is designed. Permanent, clearly legible markings shall indicate the image receptor size and SID for which each aperture is designed and shall indicate which aperture is in position for use.

Source: Rule 333-106-0301 — Additional Requirements for Radiographic Machines: Beam Limitation for Radiographic Systems Other Than Fluoroscopic, Dental Intraoral, Veterinary Systems, or Computed Tomography(CT), https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-106-0301.

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 333-106-0301’s source at or​.us