7. principles of exposure and image quality

Question 1

The Unit used to indicate the total quantity of x-rays in an exposure is :

Answer 1

mAs

Question 2

which of the following will result in increased radiographic density?

Answer 2

1. increased mA 2. increased exposure time
2. decreased source to image receptor distance (SID)

Question 3

The mass density of the body part is referred to as

Answer 3

tissue density

Question 4

the primary controller of radiographic density is

Answer 4

mAs

Question 5

the difference in radiographic density between any two adjacent portions of the image is called

Answer 5

contrast

Question 6

the primary factor controlling radiographic contrast and x-ray penetration is :

Answer 6

KVP

Question 7

generalized unwanted exposure on the image is called FOG

Answer 7

fog

Question 8

A misrepresentation in the size or shape of the structure being examined is called

Answer 8

distortion

Question 9

the fuzzy unsharpness at the edges of the structure or body parts is called

Answer 9

penumbra

Question 10

the smaller the effective focal spot the less the penumbra and the greater the spatial resolution

Answer 10

less , greater