Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ARRT Core Mock > CORE- Safety > Flashcards

CORE- Safety Flashcards

1
Q

The contrast in the radiographic image is controlled by

A

kVp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the following can the limited operator do to keep radiation exposure to patients as low as reasonably achievable? 1. Use a small radiation field 2. Use the highest kVp possible 3. Never use an SID below 40 inch

A

1, 2, and 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A smaller effective focal spot produces

A

greater image sharpness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Higher kVp settings produce images with

A

long-scale contrast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What term is applied to the distance from one crest to the next in a sine wave?

A

wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When a body part appears on a radiograph as longer than it actually is, the term used is

A

elongation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

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

A
  1. fog and 3. collimation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A
  1. kilovoltage and 2. filtration
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The unit commonly used to report the effective dose to occupational workers in the US is

A

mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The federal regulation for the lead-equivalency of protective aprons that are worn in the radiographic room is __ mm

A

0.5mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the guiding philosophy of radiation protection?

A

ALARA (as low as reasonably achievable)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which of the following is an accurate statement regarding the characteristics of x-rays? They can:

A

penetrate matter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The lead-equivalent thickness of a gonadal shield should be __mm

A

0.5mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following minimizes shape distortion? 1. Position plane of subject parallel to plane of IR, 2. Position plane of subject perpendicular to plane of IR, 3. Position the CR perpendicular to IR and subject

A
  1. Position plane of subject parallel to plane of IR and 3. Position the CR perpendicular to IR and subject
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following occurs when the mA is doubled? 1. The number of x-ray photons decreases by 50%, 2. Radiographic density increases, 3. There are twice as many photons in the x-ray beam

A
  1. Radiographic density increases and 3. There are twice as many photons in the x-ray beam
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The primary controlling factor of penetration of x-rays is

A

kVp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The frequency of a sine wave is measured by the:

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

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

A

focal spot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

All electromagnetic energy moves through space at the same

A

velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

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

A

long-scale contrast

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

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

A

1, 2, and 3

22
Q

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

A

high contrast

23
Q

The SI unit for measuring absorbed dose is

A

Gray (Gy-t)

24
Q

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

A

it is totally absorbed by the atom

25
Q

The annual effective dose limit for an occupational worker is

A

50 mSv

26
Q

The primary controlling factor of contrast is

A

kilovoltage (kVp)

27
Q

The inverse square law states that the intensity of x-ray beam ___ to the square of the distance?

A

inversely proportional

28
Q

The geometric factors that affect the formation of the image are 1. SID, 2. OID, 3. focal spot

A

1, 2 and 3

29
Q

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

A

characteristic radiation

30
Q

The NCRP recommended monthly equivalent dose limit for pregnancy worker is __ mSv

A

0.5

31
Q

What is required to move the electron stream rapidly across the x-ray tube?

A

high potential difference

32
Q

What is the SI unit of exposure that measures radiation in the air?

A

Air kerma (Gy-a)

33
Q

Which quality factor is a key to visibility of detail?

A

contrast

34
Q

As kVp is increased, compton interactions will

A

increase

35
Q

Which of the following changes decrease the dose to the limited operator? 1. minimize the time spent in the radiation area, 2. increase the distance between the operator and the source of radiation, 3. use shielding-control booth and lead apparel

A

1, 2, and 3

36
Q

Patient doses in radiography are usually calculated as the

A

entrance skin exposure (ESE)

37
Q

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

A

density, contrast, distortion, and spatial resolution

38
Q

A change from the small focal spot to the large focal spot results in

A

decreased resolution

39
Q

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

A

effective focal spot

40
Q

What are the four essential elements required for x-ray production?

A

a target, vacuum, electron source, and a high potential difference

41
Q

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

A

mA, exposure time, kV, and SID

42
Q

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

A

step-down transformer

43
Q

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

A

by decreasing contrast

44
Q

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

A
  1. decrease in kVp and 2. decrease in field size
45
Q

If the mAs doubles, the quantity of exposure will

A

double

46
Q

Short term effects of radiation would occur within how long?

A

3 months

47
Q

The unit of potential difference is the:

A

volt

48
Q

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

A

inner shell electron

49
Q

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

A

outer orbital electron

50
Q

Which of the following would be considered characteristics of x-rays? 1. travel in straight lines, 2. can cause a biological effect in tissue, 3. cannot be seen, felt, or heard

A

1, 2, and 3

ARRT Core Mock (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions