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RAD Terms
| Term | Definition |
|---|---|
| ALARA | As Low As Reasonably Achievable - a concept that states that all exposure to radiation must be kept to a minimum |
| Cathode | Negative electrode in the x-ray tube |
| Density | Overall blackness or darkness on an image |
| Focusing Cup | Keeps electrons suspended in an electron cloud at the cathode and directs them toward the target |
| Silver Halide Crystals | Absorb radiation during x-ray exposure and store energy emitted from the radiation |
| kVp | Highest voltage of x-ray tube used during an exposure |
| Latent Period/Image | Time between exposure to ionizing radiation & appearance of image |
| Milliamperage | One one-thousandth (1/1000) of an ampere; a unit of measurement used to describe the intensity of an electrical current |
| Primary radiation | Same as primary beam; most penetrating beam produced at the target of the anode |
| Radiolucent | Body structures that radiation can easily pass through appear radiolucent (dark) on an image. For example, air spaces, soft tissues, abscesses, tooth decay, and dental pulp appear as radiolucent images |
| Scatter radiation | Form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter |
| Secondary Radiation | X-radiation that is created when the primary beam interacts with matter |
| X-ray | High-energy ionizing electromagnetic radiation |
| Bisecting Technique | Intraoral technique of exposing dental images where the x-ray beam is directed, perpendicular to an imaginary line which bisects the angle. |
| Cone- Cutting | A clear unexposed area on the film. The position indicator device was not positioned correctly, leaving a half moon like artifact of unexposed film |
| Elongation | Teeth appear long. Insufficient vertical angulation (not enough) |
| Foreshortening | Teeth appear too short. Excessive vertical angulation (too much) |
| Ionization | Process by which electrons are removed from atoms, causing the harmful effects of radiation in humans. |
| Radiopaque | Body structures that radiation does not easily pass through appear radiopaque (white or light gray) on an image. Tooth enamel, dense areas of bone, and metal restorations are examples of radiopaque images. |
| Cephalometric Radiograph | Shows the side view of your head, exposing teeth, jaws, and surrounding structures including soft tissues |
| Digital Image | Electronic signals captured by sensors and displayed on computer monitors |
Created by:
KellsS
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