Chapter 7 Book Questions

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1

The process by which a beam of x-ray photons is reduced as it passes through matter is known as:

attenuation

2

Computed radiography uses what as its image receptor?

photostimulable phosphor plate

3

The chief controlling factor of radiographic contrast is:

kilovoltage peak (kVp)

4

What mAs value would result using the 500 mA setting at 0.25 second?

125 mAs

5

Which image receptor system does NOT use light during exposure?

direct capture

6

A radiograph is made using 40 mAs at a 40-inch SID. If the image must be repeated at a 72-inch SID, what mAs value is necessary to maintain the same exposure?

130 mAs

7

The 15% rule helps explain the effect of _______ on exposure.

kilovoltage peak (kVp)

8

Which of the following is NOT a radiographic contrast medium?

barium compounds

air

iodine compounds

water

water

9

The most common cause of radiographic unsharpness is:

motion

10

What term in digital imaging is used to describe a numeric representation of the quantity of exposure received by a digital image receptor?

exposure indicator