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Ch11 Vocab
| Term | Definition |
|---|---|
| ALARA | As Low As Reasonably Achievable Program for reducing radiation exposure |
| Anechoic | |
| Annular array | |
| Anode | Pos. Charged electrode in x-ray tube |
| Bucky | |
| Cathode | Neg. Charged electrode in x-ray tube Produces electrons |
| Collimators | Device to restrict x-ray beam Reduces scatter |
| [Radiographic] Contrast | Differences in density between adjacent areas of radiographic image |
| Direct exposure film | |
| Distance enhancement | |
| Echoic | |
| Film latitude | |
| Film-focal distance (FFD) | |
| Fluoroscopy | |
| Focused grids | |
| Heel effect | |
| HypeERechoic | |
| HypOechoic | |
| Intensifying screens | |
| Isoechoic | |
| Kilovoltage peak (kVp) | |
| Latent image | |
| Maximum permissible dose (MPD) | |
| Milliamperage (mA) | |
| Mirror image | |
| Object-film distance (OFD) | |
| Penumbra effect | |
| Radiographic density | |
| Radiolucent | |
| Radiopaque | |
| Rem | |
| Sievert (SV) | |
| Slice thickness | |
| Sonolucent | |
| Source-image distance (SID) | |
| Ultrasonography | |
| Transmits all sound to deeper tissue | |
| Arranges crystals in concentric rings | |
| Potter-Bucky diaphragm Device putting x-ray grid in motion | |
| More sensitive to direct x-ray than light | |
| Sound beam transverse a cystic structure | |
| Echogenic Most sound is reflected back to transducer | |
| Film's inherent ability to produce shades of gray | |
| Distance from target of x-ray tube to film or plate See also: Source-image distance (SID) | |
| Continual stream of images X-ray technique | |
| X-ray grid system with lead strips angles progressively increasing | |
| Visible difference in radiograph density | |
| More sound to transducer | |
| Less sound to transducer | |
| Plates that emit light in x-ray cassette | |
| Same echotexture | |
| Max voltage applied Determines energy of electrons | |
| Invisible x-ray image produce after light exposure | |
| Amount of radiation allowed according to National Council on Radiation Protection and Measuremengs 5 rem/year | |
| Current produced by x-ray tube during exposure | |
| Illusion of liver on thoracic side or appearance of 2and heart | |
| Distance between object being radiographed and film or plate See also: Object-image distance (OID) | |
| Partial/imperfect shadow outside complete shadow Fuzziness caused by stray x-rays | |
| Degree of blackness on radiograph | |
| Black on radiograph | |
| White on radiograph | |
| Roentgen equivalent in man Dose equivalent of radiation exposure | |
| Radiation dose equivalent to tissue absorbed dose | |
| Transducer receives echoes w/ diff amplitudes from same area | |
| Most sound is transmitted to deeper tissues | |
| Distance from target of x-ray tube to film or plate See also: Film-focal distance (FFD) | |
| Diagnostic ultrasound Noninvasive soft tissue imaging method |
Created by:
HalleePW
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