OAR 333-106-0364
Computed Tomography X-ray Systems: Initial and Annual Qualified CT Medical Physicist Scanner Performance Evaluations

(1) A CT medical physicist shall complete an initial performance evaluation of the CT scanner before use on patients and annually thereafter.
(2) A performance evaluation of the CT system shall be performed after any change in the equipment which might cause a change in the radiation output or image quality.
(3) A calibrated dosimetry system shall be used to measure the radiation output of a CT scanner. Calibration of the dosimetry system shall be within the preceding 24 months, or per manufacturer’s specifications, and shall be traceable to a national standard.
(4) A performance evaluation shall include the following, as a minimum:
(a) Alignment light accuracy;
(b) Alignment of table to gantry;
(c) Gantry tilt, as appropriate;
(d) Slice localization from scanned projection radiograph;
(e) Table travel accuracy;
(f) Radiation beam width;
(g) Image quality, including the following:
(A) Gray level performance of CT acquisition display monitors,
(B) Low-contrast performance,
(C) Image uniformity,
(D) Noise,
(E) Artifact evaluation, and
(F) Spatial resolution;
(h) CT number uniformity;
(i) Dosimetry, including the following:
(A) Dose indicator such as computed tomography dose index (CTDI¬vol), and
(B) Patient radiation dose for representative examinations.
(j) A safety evaluation, including the following:
(A) Visual inspection,
(B) Audible and visual signals, and
(C) Posting requirements.
(k) A review of clinical protocols shall include at a minimum:
(A) An evaluation of scanner features, including kV, mAs, detector configuration, reconstructed scan width, pitch, reconstruction algorithm, and other features such as dose reduction options, including automatic exposure controls, iterative reconstruction techniques, etc. to ensure they are being properly utilized; and
(B) A review of the following clinical protocols, if they are used on the CT scanner:
(i) Pediatric head (one year old);
(ii) Pediatric abdomen (five years old; 40–50 pounds or approximately 20 kilograms);
(iii) Adult head;
(iv) Adult abdomen (70 kilograms);
(v) High-resolution chest;
(vi) Brain perfusion; and
(vii) Low dose lung cancer screening exam.
(l) A review of the facility’s ongoing quality control program, including test results and corrective action.
(5) Evaluations and tests shall be performed following written procedures and methods found in the latest ACR CT Quality Control Manual.
(6) The qualified CT medical physicist shall prepare a report that includes the following:
(a) A summary of the performance evaluation required under section (1) of this rule;
(b) Recommendations for necessary improvements; and
(c) The type of dosimetry system used, including the date of the last calibration.
(7) The report required under section (6) of this rule shall be provided to the CT facility within 30 days after completion of the evaluation and shall be made available to the Authority upon request.
(8) The facility shall keep written documentation of actions taken in response to the recommendations from the performance evaluation report.
(9) Records of preventive maintenance and repair shall be retained for each CT scanner and be made available to the Authority upon request.

Source: Rule 333-106-0364 — Computed Tomography X-ray Systems: Initial and Annual Qualified CT Medical Physicist Scanner Performance Evaluations, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=333-106-0364.

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 333-106-0364’s source at or​.us