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Stack #158346

Radiographic Imaging

QuestionAnswer
process by which a beam of radiation is reduced in energy when passing through tissue or other materials. Attenuation
Theoretical center of a beam of radiation. Central Ray
Degree of darkening of exposed and processed photographic or radiographic film Density
Misinterpretation of the true size of shape of an object. Distortion
With motion Dynamic
Unwanted exposure or film densities Fog
Device consisting of thin lead strips designed to permit primary radiation to pass while reducing scatter radiation. Grid
Amount of filtration necessary to reduce the intensity of the radiation beam to one half its original value. Half-Value Layer
Medium used to capture the image for recording, such as x-ray film or a digital imaging plate. Image Receptor
Layer of luminescent crystals placed inside a cassette to expose x-ray film efficiently and thereby significantly reduce patient dose. Intensifying Screen
Mathematical formula that describes the relationship between radiation intensity and distance from the source of the radiation. Inverse Square Law
Measure of the potential difference, which controls the quality and quantity of x-ray photons produced in the x-ray tube. Kilovoltage Peak
Invisible image created after exposure but before processing. Latent image
Measurement of milliamperage times seconds, which controls the quantity of x-ray photons produced in the x-ray tube. Milliampere Seconds
Ability of an x-ray beam to pass through an object, controlled by the kVp of the beam. Penetrating Ability
Fuzzy border of an object as imaged radiographically. Penumbra
Quantum or particle of radiant energy Photon
automatic collimation system used on diagnostic x-ray units. Positive Beam Limitation
x-ray beam after it leaves the x-ray tube and before it reaches the object Primary Radiation
permitting the passage of x-rays or other forms of energy with little attenuation Radiolucent
not easily penetrable by x-rays or other forms of radiant energy. Radiopaque
Representation of an object's true borders Recorded Detail
Relative measurements of the speed of radiographic film and intensifying screen system. Relative Speed
Radiation resulting after the x-ray beam hits the object. Remnant Radiation
A measurement of the recorded detail on a radiograph. Resolution
Radiation produced from x-ray photon interactions with matter in such a way that the resulting photons have continued in a different direction. Scatter Radiation
The distance between the source of the x-rays (usually the focal spot of the x-ray tube) and the image receptor. Source-to-Image Receptor Distance
Unmoving Static
True border of an object as imaged radiographically. Umbra
Created by: J. Renee on 2008-10-02



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