| Term | Definition |
|---|
| Amplitude | With respect to a sine wave, the distance between peak & trough |
| Bucky | A moving grid that limits the amount of scatter radiation reaching a radiographic image receptor, thereby increasing image contrast |
| Cassette | A device used in radiography for holding a sheet of x-ray film and a set of intensifying screens; may have a grid to absorb scatter radiation |
| Collimator | A device for limiting the size and shape of an x-ray beam |
| Detent | A mechanism that tends to stop a moving part in a specific location; are built into x-ray tube supports to facilitate tube placement at standard locations |
| Dosimeter | An instrument to detect and measure accumulated radiation exposure |
| Electromagnetic energy | Pertaining to magnetism that is induced by an electric current; also refers to energy in the form of electromagnetic waves, such as light, x-rays, and radio waves |
| Erythema | "Radiation burn", redness, or inflammation of the skin or mucous membranes caused by the dilation and congestion of superficial capillaries |
| Fluoroscope | A device used for the immediate projection of a radiographic image on a fluorescent screen of cathode ray tube monitor for visual examination |
| Focal spot | A small area on an x-ray tube target where the electron stream strikes the target and x-rays are produced |
| Frequency | With respect to a sine wave, the number of times per second that a wave crest passes a given point |
| Grid | A device placed between the patient and the image recpetor during a radiographic examination to limit the amount of scatter radiation reaching a radiographic image receptor, thereby increasing the image contrast |
| Image intensifier | An electronic device used to produce a fluoroscopic image with a low-radiation exposure. A beam of x-rays passing through the patient is converted by a special vacuum tube into a pattern of electrons. The electrons are accelerated and concentrated onto a small fluorescent screen, where they present a bright image, which is generally displayed on a television monitor |
| Kilovoltage peak (kVp) | Potential difference measured at the peak of the electrical cycle; an x-ray control setting that determines the penetrating power of the x-ray beam |
| Latent image | The unobservable image stored in the silver halide emulsion of film; it is made visible by processing |
| X-ray | A form of electromagnetic radiation that has the power to penetrate matter and form an image of that matter on photographic emulsion |
| Wilhelm Conrad Roentgen | Accidentally discovered x-rays; name "x" ray derived from the fact that "x" represents the unknown |
| Thomas Edison | Instrumental in investigating fluorescent phosphors used today in Radiography |
| Clarence Dally | 1904, Assistant to Thomas Edison, who died of overexposure to radiation |
| X-ray tube | Source of radiation; enables us to take "still" images of the body |
| Fluoro tower | Enables us to view moving images of the body |
| X-ray table | Floating tabletop that enables us to easily align patient with x-ray tube and image receptor; can be adjusted from the horizontal to vertical position for various exams |
| Wall bucky | Enables us to take standing (erect) images; also contains a grid |
| X-ray tube housing | Absorbs excess radiation, allowing x-ray to be directed toward patient only |
| X-ray tube support | Enables us to move the tube in all directions and lock in position over the patient |
Combine with other sets
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