rad tech ch 7

process by which a beam of radiation is reduced in energy when passing through tissue or other materials

theoretical center of a beam of radiation

difference between adjacent densities on a radiograph

degree of darkening of exposed and processed photographic or radiographic film

misrepresentation of the true size or shape of an object

with motion

unwanted exposure or film densities

device consisting of thin lead strips designed to permit primary radiation to pass while reducing scatter radiation

amount of filtration necessary to reduce the intensity of the radiation beam to one half its original value

medium used to capture the image for recording, such as x-ray film or a digital imaging plate

layer of luminescent crystals placed inside a cassette to expose x-ray film efficiently and thereby significantly reduce patient dose

mathematical formula that describes the relationship between radiation intensity and distance from the source of the radiation

measure of the potential difference, which controls the quality and quantity of x-ray photons produced in the x-ray tube

invisible image created after exposure but before processing

measurement of milliamperage times seconds, which controls the quantity of x-ray photons produced in the x-ray tube

ability of an x-ray beam to pass through an object, controlled by the kVp of the beam

fuzzy border of an object as imaged radiographically

quantum or particle of radiant energy

automatic collimation system used on diagnostic x-ray units

x-ray beam after it leaves the x-ray tube and before it reaches the object

permitting the passage of x-rays or other forms of energy with little attenuation

not easily penetrable by x-rays or other forms of radiant energy

representation of an object's true borders

relative measurements of the speed of a radiographic film and intensifying screen system

radiation resulting after the x-ray beam exits the object

a measurement of the recorded detail on a radiograph

radiation produced from x-ray photon interactions with matter in such a way that the resulting photons have continued in a different direction

the distance between the source of the x-rays (usually the focal spot of the x-ray tube) and the image receptor

unmoving

true border of an object as imaged radiographically