17.3
Quality assurance protocols for offices that use digital imaging are also required as well as perform back-up of digital data on computer on a daily basis. Annual tests for calibration of imaging equipment and commercial kits are available for a variety of checks. Commercial kits include a set of test objects and allow for the following checks: erasure cycle efficiency, image retention, sensitivity, uniformity, scaling errors, blurring artifacts, and resolution. Performance testing and monitoring of digital imaging equipment must be done in accordance with equipment manufacturer specifications.
Digital Equipment
Annual calibration of imaging equipment by qualified technicians.
Sensors
Sensors require periodic examination for scratching, bending, and general wear-and-tear. Digital sensors and imaging plates are re-used multiple times, and greater care in handling and cleaning of sensors is necessary. Imaging sensors that are damaged by debris or bending show the artifacts repeatedly when the sensors are re-exposed to radiation. Dental radiographers must check the wired connection for any signs of separation from the sensor or deterioration.
Computer
It is recommended that digital data be backed up on computers on a daily basis. Updates and maintenance of computers and laser scanner devices should adhere to the manufacturer’s instructions. Imaging software may require periodic updates that should be done in order to maintain maximum efficiency and performance.
Commercial kits are available to check imaging performance, including:
- Erasure cycle efficiency
- Image retention
- Sensitivity
- Uniformity
- Scaling errors
- Blurring artifacts
- Contrast
- Resolution
Quality Administration Procedures
Management of the quality assurance plan includes a description of the plan, assignment of duties, monitoring schedules, maintenance schedules, record-keeping logs, planning for evaluation and revision, and in-service training.
A copy of the quality administration plan should be made available to all staff members, and each staff member should participate in the quality assurance program. Periodic in-service training of all staff members is recommended.
Operator Competence
A dentist is ultimately responsible for all dental images exposed in their office. A nondiagnostic film must be retaken, and retakes expose the patient to additional radiation. Repeated operator errors and errors requiring retakes should be recorded. Continuing education courses and individualized instruction can be used to upgrade and improve the competence of the dental radiographer.
Radiation Protection Officer
The responsibility for ensuring that quality assurance testing is carried out rests with the Radiation Protection Officer, who must be a dentist qualified to take radiographs. Dentists are also responsible for all other matters of radiation safety related to the taking of radiographs in the dental office. This means ensuring that only HARP-qualified personnel are permitted to take radiographs and that the office has received the Ministry of Health and Long-Term Care’s approval for the installation of radiography equipment.
Information for dental x-ray facilities [web article]
The article from the Royal College of Dental Surgeons Ontario (RCDSO) discusses regulatory requirements and procedures for dental x-ray facilities in Ontario, as mandated under the Healing Arts Radiation Protection Act. It outlines the responsibilities of a Radiation Protection Officer, the installation approval process for new x-ray equipment, and the necessity of conducting regular quality and safety tests. Additionally, it emphasizes the need to keep detailed records and ensure compliance through periodic inspections by the X-ray Inspection Service.
Note: It is essential that you review these regulations so that you are aware of federal and provincial requirments for Quality Assurance.
You have completed all of the Module 4 chapters. Please return to Blackboard to complete the Chapter Case Study Quiz.
Media Attributions
- Iannucci & Howerton: Dental Radiography Principles and Techniques, 6th Edition, Chapter 17, CC BY-NC-ND
