review activity

Question 1

true/false: In radiography, optical density is a visible representation of the quantity of X-ray photons reaching the IR.

Answer 1

true

Question 2

true/false: increasing mAs increases optical density

Answer 2

true

Question 3

true/false: increasing mAs increases brightness

Answer 3

false

Question 4

___ controls the scale of contrast in the radiographic image

Answer 4

kVp

Question 5

____ controls optical density in the radiographic image

Answer 5

mAs

Question 6

A radiograph that has sharp differences in optical density is called:

Answer 6

high contrast

Question 7

A radiograph with a small number of widely varying optical density values is said to possess:

short scale v. long scale

Answer 7

short scale contrast

Question 8

Doubling the mAs will result in:
1. increased patient dose
2. twice as many photons in the x-ray beam
3. increased radiographic density

Answer 8

1, 2, and 3

Question 9

If all other factors are unchanged and mA is decreased, image optical density will

Answer 9

directly decrease

Question 10

If all other factors are unchanged and time is decreased, image optical density will

Answer 10

directly decrease

Question 11

According to the reciprocity law, a technique of 200 mA, .5 second and 68 kVp can be changed to 400 mA, _______ second and 68 kVp.

Answer 11

.25

Question 12

In the term kVp, the ‘p’ actually stands for:

Answer 12

highest voltage (peak)