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W - Glossary of Terms
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| W - Glossary of Terms |
| Washing | The stage of processing during which any remaining chemicals are removed from the film. |
| Watt (W) | One ampere of current flowing through an electric potential of one volt. |
| Wave equation | The formula stating that velocity equals frequency multiplied by wavelength. |
| Waveform | The graphic representation of a wave. |
| Wavelength | The distance between similar points on a sine wave; the length of one cycle. |
| Wave-particle duality | The principle stating that both wave and particle concepts must be retained, since wavelike properties are exhibited in some experiments and particle-like are exhibited properties in others. |
| Wave theory | The theory that electromagnetic energy travels through space in the form of waves. |
| Weight | The force on a mass caused by the acceleration of gravity. Properly expressed in newtons (N), but commonly expressed in pounds (lb). |
| Wetting | A process that makes the emulsion film swell so that subsequent chemical baths can reach all parts of the emulsion uniformly. |
| Wetting agent | The agent, usually water, that treats the radiograph so that the chemicals can penetrate the emulsion. |
| White matter | Axions are surrounded by myelin, a fatty substance which is almost white in colour. Areas of the central nervous system rich in axions constitute the white matter (see grey matter). |
| Whole body | For purposes of external exposure, the head, trunk (including gonads), arms above the elbow, and leg above the knee. |
| Whole-body exposure | A radiographic exposure in which the whole body, rather than an isolated part, is irradiated. |
| Window | A thin section of glass envelope through which the useful beam emerges. |
| Windowing | The technique that allows one to see only a "window" of the entire dynamic range. |
| Window level | The location on a digital image number scale where the levels of grays are assigned. It regulates the optical density of the displayed image and identifies the type of tissue to be imaged. |
| Window width | A specific number of gray levels or digital image numbers assigned to an image. It determines the gray-scale rendition of the imaged tissue and therefore the image contrast. |
| Word | Two bytes of information. |
| Work (W) | The product of the force on an object and the distance over which the force acts. Expressed in Joules (J). W = F X d. |
| Workload (W) | The product of the maximum milliamperage (mA) and the number of X-ray examinations performed per week. Expressed in milliamperes per minute per week (mA/min/wk). |
| Workstation | A powerful desktop system, often connected to larger computer systems so that users can transfer and share information. |
| Wormian bone | (wer´me-an) See sutural bone. |
Glossary of terms index - A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
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AndyC |
Latest page update: made by AndyC
, Jan 18 2010, 8:46 AM EST
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