Quiz 3 Wordbank

Question 1

Attenuation

Answer 1

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

Question 2

Brightness

Answer 2

Function of display monitor; changes image lightness/darkness 

Question 3

Contrast

Answer 3

Contrast is the difference between the ranges of adjacent IR exposures represented as gray tones in an image 

Question 4

Density

Answer 4

Degree of darkening on the image

Question 5

Distortion

Answer 5

Misrepresentation of the true size or shape of an object

Question 6

Fog

Answer 6

Undesirable exposure to the image receptor

Question 7

Grid

Answer 7

Device consisting of thin lead strips designed to permit primary radiation to pass while absorbing scatter radiation 

Question 8

Intensifying screen

Answer 8

Layer of luminous and crystals placed inside a cassette to expose x-ray film efficiently and thereby significantly reducing patient dose 

Question 9

Kilovolt peak

Answer 9

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

Question 10

Latent image

Answer 10

Invisible image created after exposure, but before processing 

Question 11

Milliampere-seconds

Answer 11

Measurement of milliamperage multiplied by the exposure time in seconds, which controls the total quantity of x-ray photons produced in the x-ray tube 

Question 12

Penumbra

Answer 12

Fuzzy edge of an object as imaged radiographically; also known as image unsharpness

Question 13

Primary radiation

Answer 13

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

Question 14

Radiopaque

Answer 14

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

Question 15

Scatter radiation

Answer 15

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

Question 16

Source-to-image distance

Answer 16

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

Question 17

Spatial resolution

Answer 17

Degree of accuracy of the structural lines actually recorded in the image 

Question 18

Window level

Answer 18

Digital image processing parameter that changes displayed image brightness on the monitor, usually through the use of a mouse 

Question 19

Window width

Answer 19

Digital image processing parameter that changes displayed image contrast on the monitor, usually through the use of a mouse 

Question 20

Radiolucent

Answer 20

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