Manufacturers of dental X-ray systems use a variety of image receptors to capture the x-ray image. Image receptors are classified as direct or indirect, and the majority of dental X-ray systems use direct receptors. Indirect receptors are designed to be used with a focused beam of x-rays to produce an image. The image receptors are used to capture the x-ray image and produce a digital image.
A dental X-ray system is defined in Section C as a system used to produce an image on a film medium, and a dental X-ray apparatus is defined in Section D as an apparatus to which a patient is exposed to x-rays, whether or not the patient is actually in the device or in close proximity to it.
Direct and indirect image receptors can also be classified as film or computed radiography (CR) (where the image receptor captures an x-ray exposure and produces an image on a photographic plate).
The equipment used for dental radiography must be maintained according to manufacturer’s recommendations. These include periodic maintenance (e.g. cleaning, re-calibrating, checking and verifying functions) and a maintenance schedule to be performed. Radiographic testing and verification of proper operation of the system is also required. This inspection method involves the use of x-rays. X-rays are electronically-produced ionizing radiation and the inspection method may be used on both ferrous and nonferrous castings. Dental radiography is also a method that uses x-ray or gamma energy to pass ionizing radiation through a casting to reveal internal discontinuities on a film medium.
All sources must be properly shielded and shielded correctly, and the shielding be adequate to allow the use of the system. The operating procedures and practices for proper management of radiation exposure must be followed. All imaging equipment, including the digital image receptor, must be installed, used and maintained in accordance with the manufacturer’s instructions. Additional requirements applicable to dental radiography equipment are described in Section A. The Regulation also provides requirements for quality assurance standards.
This document addresses the following topics in relation to X-ray examinations:
Radiographic examinations; and
Radiographic examinations of children.
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