Safety

Question 1

Which of the following reduces the amount of scatter radiation fog on a radiograph? 1. Decrease in kVp 2. Decrease in field size 3. Decrease in grid ratio

Answer 1

1 and 2

Question 2

The frequency of a sine wave is measured by the?

Answer 2

number of times per second that the crest passes a given point

Question 3

Compton scatter occurs when an x-ray photon interacts with which part of the atom in the patients body?

Answer 3

Outer orbital electron

Question 4

The photoelectric effect occurs when an incoming photon from the primary beam interacts with which part of the atom in the patients body?

Answer 4

Inner shell electron

Question 5

The factors that affect x-ray quality are? 1. kilovoltage 2. filtration 3. mAs

Answer 5

1 and 2

Question 6

What are the four primary aspects that directly affect how the x-ray image looks?

Answer 6

Density, distortion, contrast, and spatial resolution

Question 7

As kVp increases, Compton interactions will?

Answer 7

Increase

Question 8

Which of the following are the prime factors of exposure in radiography?

Answer 8

Milliamperage, exposure time, kilovoltage, and SID

Question 9

Scatter radiation fog will? 1. Increase density 2. decrease contrast 3. reduce the visibility of detail

Answer 9

1,2 and 3

Question 10

Patient doses in radiography are usually calculated as the?

Answer 10

entrance skin exposure (ESE)

Question 11

The precise area on the target where the x-rays strike is called the?

Answer 11

focal spot

Question 12

What type of radiation is produced when an incoming electron interacts with the k-shell electron in the tungsten atom?

Answer 12

Characteristic

Question 13

The unit of potential difference is?

Answer 13

volt

Question 14

All electromagnetic energy moves through space at the same?

Answer 14

velocity

Question 15

When an image demonstrates many densities, and there is little difference between the densities, the image is described as having?

Answer 15

long-scale contrast

Question 16

The degree of angulation of the x-ray tube target will determine the

Answer 16

effective focal spot

Question 17

The SI unit for absorbed dose is the?

Answer 17

gray (Gy-t)

Question 18

Which quality factor is a key to visibility of detail?

Answer 18

contrast

Question 19

Which of the following transformers would have more windings on the primary side

Answer 19

step- down transformer

Question 20

The annual effective dose limit for an occupational radiation worker is?

Answer 20

50 mSv

Question 21

Contrast is influenced by 1. SID 2. fog 3. collimation

Answer 21

2 and 3

Question 22

How does scatter radiation fog reduce the visibility of detail in a radiographic image?

Answer 22

by decreasing contrast

Question 23

When an image demonstrates great differences between the densities, the image is described as?

Answer 23

high contrast

Question 24

During a photoelectric effect, an incoming photon interacts with the atom in the patient’s body. What happens to the photon with this effect?

Answer 24

It is totally absorbed by the atom

Question 25

Higher kVp settings produce images with

Answer 25

long scale contrast