RADIOGRAPHER ONLINE EXAM PRACTICE KIT 16

Question 1 of 100

1. Question

1 points

The amount of radiation deposited per unit length of tissue travelled by incoming photons is called:

Tissue exposure
Linear deposition of energy
Linear energy transfer
Effective dose limit

Question 2 of 100

2. Question

1 points

Cataractogenesis , life span shortening ,embryological effects, and carcinogenesis are examples of:

Short term somatic effects
Genetic effects
Acute radiation syndrome
Long term somatic effects

Question 3 of 100

3. Question

1 points

Compton interaction:

Increases contrast in the radiographic image
Results in scattering of the incident electrons
Decreases recorded detail in the radiographic image
Decreases contrast in the radiographic image

Question 4 of 100

4. Question

1 points

Rem multiplied by a radiation weighting factor equals:

Rads
Roentgens
Grays
No such equation is used

Question 5 of 100

5. Question

1 points

Effective dose limit:

Is the level of radiation that an organism can receive and probably sustain no appreciable damage
Is a safe level of radiation that can be received with no effects
Should be absorbed annually to maintain proper immunity to radiation
Is 5000 mrem per year for the general public

Question 6 of 100

6. Question

1 points

Radiation with a high LET:

Has low ionization
Is highly ionizing
Carries a low quality factor
Equates with a low RBE

Question 7 of 100

7. Question

1 points

Radiation protection is based on which dose response relationship?

Linear threshold
Nonlinear- non threshold
Linear nonthreshold
Linear nonthreshold
Nonlinear threshold

Question 8 of 100

8. Question

1 points

Which of the following states that the radiosensitivity of cells is directly proportional to their reproductive activity and inversely proportional to their degree of differentiation?

Inverse square law
Law of Bergonic and Tribondeau
Reciprocity law
Ohm's law

Question 9 of 100

9. Question

1 points

Which of the following causes about 95% of the cellular response to radiation?

Direct effect
Law of Bergonic and Tribondeau
Target theory
Indirect effect

Question 10 of 100

10. Question

1 points

When radiation strikes DNA , which of the following occurs?

Direct effect
Law of Bergonic and Tribondeau
Target theory
Indirect effect

Question 11 of 100

11. Question

1 points

The amount of radiation that causes the number of genetic mutations in a population to double is called the:

Threshold dose
Doubling dose
Mutagenic dose
Genetic dose

Question 12 of 100

12. Question

1 points

the units of equivalent dose, activity,in-air exposure and absorbed dose are:

Roentgen,rad,rem,curie
Rad,coulomb per kilogram,Curie,Becquerel
Rem,curie,roentgen,rad
Sievertt,becquerel,gray, coulomb per kilogram

Question 13 of 100

13. Question

1 points

Medical x-rays are an example of:

Natural background radiation
Artificially produced radiation
Nonionizing radiation
Ionizing, Natural background radiation

Question 14 of 100

14. Question

1 points

The equivalent dose limit for an embryo or fetus is:

500 mrem during gestation
5 rem per year
.5 rem per month
50 mrem peryear

Question 15 of 100

15. Question

1 points

The photoelectric effect:

Results in the absorption of incident photon
Results in the absorption of incident electron
Produces contrast fog on the radiographic image
Is the same as brems radiation

Question 16 of 100

16. Question

1 points

The effective dose limit for radiographers:

3 rem per quarter
500 mrem per year
5000 mrem per year
100 mrem per month

Question 17 of 100

17. Question

1 points

The average dose to active bone marrow as an indicator of somatic effects on a population is called:

Doubling dose
Bone dose
GSD
Mean marrow dose

Question 18 of 100

18. Question

1 points

A radiation dose that if received by the entire population would cause the same genetic injury as the total of doses received by the members actually being exposed is called:

Genetically significant dose
Doubling dose
Mean marrow dose
Genetic dose

Question 19 of 100

19. Question

1 points

A lead apron of at least what thickness should be worn while being exposed to scatter radiation?

0.25 –mm Pb equivalent
0.50 –mm Pb equivalent
0.50 -mm AI equivalent
0.10 -mm AI equivalent

Question 20 of 100

20. Question

1 points

Use of thyroid shield of at least what thickness should be used for fluroscopy?

0.10 –mm Pb equivalent
0.50 –mm Pb equivalent
0. 50AI equivalent
0.10 AI equivalent

Question 21 of 100

21. Question

1 points

How thick are primary protective barriers?

1/32 inch lead equivalent
1/16 inch lead equivalent
1/32 inch concrete
1/16 inch lead equivalent

Question 22 of 100

22. Question

1 points

Primary protective barriers, if the wall must extend to a height of at least:

5 feet
6 feet
7 feet
10 feet

Question 23 of 100

23. Question

1 points

Secondary protective barriers, if the wall must extend to a height of

5 feet
6 feet
The ceiling
10 feet

Question 24 of 100

24. Question

1 points

The protective curtain hanging from the fluroscopy tower must at least

0.50 –mm Pb equivalent
0.25 –mm Pb equivalent
0. 10–mm Pb equivalent
0.25 –mm Pb equivalent

Question 25 of 100

25. Question

1 points

The Bucky slot cover must be atleast:

0.50 –mm Pb equivalent
0.25 –mm AI equivalent
0.10 –mm Pb equivalent
0.25 –mm Pb equivalent

Question 26 of 100

26. Question

1 points

Filters made of aluminium and copper are placed in the film badge to measure x-ray:

quqntity
Source
Energy
Type

Question 27 of 100

27. Question

1 points

Film badges are changed:

Quarterly
Weekly
Yearly
Monthly

Question 28 of 100

28. Question

1 points

Thermoluminescent dosimeters use what type of energy to indicate dose?

Dilithium crystals
Lithium fluoride
Flux
Silver bromide

Question 29 of 100

29. Question

1 points

TLDs are heated and release what type of energy to indicate dose?

Laser
Visible light
X-rays
Gamma rays

Question 30 of 100

30. Question

1 points

Optically stimulated luminescence (OSL) dosimeters are sensitive to exposure as low as:

1 mrem
5 mrem
10 mrem
20 mrem

Question 31 of 100

31. Question

1 points

The recording material in an OSl dosimeter is

Film
Lithium fluoride
Aluminium oxide
Silver halide

Question 32 of 100

32. Question

1 points

The energy stored in an OSl dosimeter is released when the dosimeter is exposed to:

Heat
White light
Laser
Ultrasound

Question 33 of 100

33. Question

1 points

OSl dosimeter may be worn for:

1 month
1 week
3 months
1 year

Question 34 of 100

34. Question

1 points

OSL dosimeter may be scanned and reanalyzed:

Only once
Monthly
Five times
An unlimited number of times

Question 35 of 100

35. Question

1 points

The most commonly used gonadal shield is the:

Shadow shield
Collimator
Contact shield
None of the above

Question 36 of 100

36. Question

1 points

For optimal radiation protection,what speed of exposure technique should be used?

Low kVp,high mAs
Small focal spot
All manual technique
High kVp,low mAs

Question 37 of 100

37. Question

1 points

For optimal radiation protection, what type of IR should be used?

Slow
Speed has no impact on dose
Analog
Fast

Question 38 of 100

38. Question

1 points

The minimum source to skin distance for portable radiography is:

At least 12 inches
At least 15 inches
At least 72 inches
At least 40 inches

Question 39 of 100

39. Question

1 points

The personal dosimetry report reads in what units of measurement?

Rads
Roentgens
Curies
Rem or mrem

Question 40 of 100

40. Question

1 points

How often is filtration adjusted by the radiographer?

After several exposures
Daily
As part of week quality control
Never

Question 41 of 100

41. Question

1 points

According to NCRP report #160, the effective dose for a typical CT examination is:

1.47 mSv
3.58 mSv
0.77 mSv
1.0 mSv

Question 42 of 100

42. Question

1 points

According to NCRP report #160, the typical dose for a lumbar spine examination is:

1.0 mSv
3.75 mSv
1.5 mSv
0.78 mSv

Question 43 of 100

43. Question

1 points

Of the total radiation exposure , 36 % involves:

CT and nuclear medicine
Fluroscopy
Mobile radiography and Fluroscopy
CT

Question 44 of 100

44. Question

1 points

A typical chest x-ray involves a dose of:

0.77 mSv
0.1 mSv
1.67 mSv
Negligible dose

Question 45 of 100

45. Question

1 points

According to NCRP Report #160, a typical dose for a pelvis and hip examination:

0.7 mSv
1.67mSv
3.0 mSv
0.1 mSv

Question 46 of 100

46. Question

1 points

An ionization chamber circui places:

A photomultiplier tube between the Ir and the patient
An ionization chamber beneath or behind the IR
An ionization chamber between the patient and the x-ray tube
An ionization chamber between the IR and patient

Question 47 of 100

47. Question

1 points

Full wave rectification uses:

A single semiconductor
Four silicon - based semiconductor
The x-ray tube as a semiconductor
Four silicon based semiconductor

Question 48 of 100

48. Question

1 points

A full wave rectified , three phase , 12 pulse x-ray machine produces approximately ………………..% more average photon energy than a full wave rectified ,single phase x-ray machine

35
50
41
100

Question 49 of 100

49. Question

1 points

According to the anode heel effect, the intensity of radiation is greater at the ………………. side of the x-ray tube

Anode
Central x-ray
Neither side; the beam is of uniform itensity
Cathode

Question 50 of 100

50. Question

1 points

The amount of time needed for an AEc to terminate the exposure is called:

Exposure latitude
Minimum reaching time
chamber response time
Electronic time

Question 51 of 100

51. Question

1 points

A tube rating chart is used to determine:

The safety of single exposure
The safety of a series of exposure such as performed in tomography
Patients dose per mAs
The number of exposures made on the anode

Question 52 of 100

52. Question

1 points

Where is the electron beam focused?

A
B
C
D

Question 53 of 100

53. Question

1 points

Where is the electron image produced?

A
B
C
D

Question 54 of 100

54. Question

1 points

From where the visible image distributed to viewing or recording media?

A
B
C
D

Question 55 of 100

55. Question

1 points

Where is x-ray converted to visiblee light?

A
B
C
D

Question 56 of 100

56. Question

1 points

A particular x-ray room is “shooting dark”. The problem arises when a change is made from 200 to 300 mA using fixed kVp techniques at 0.16 second.which of the following would lead to an accurate diagnosis of the problem?

Wire mesh test
Pinhole camera test
Use of a digital dosimeter to determine HVL
Use of digital dosimeter to determine exposure linearity

Question 57 of 100

57. Question

1 points

An outpatient radiographic room is used primarily for tabletop radiography of the extremities. On a particularly busy afternoon, the radiographers find that similar exposure techniques on successive patients results in substantially different radiographers. Which of the following would lead to an accurate diagnosis of the problem?

Wire mesh test
pinhole camera test
Use of a digital dosimeter to determine HVL
Use of a digital dosimeter to determine exposure reproducibility

Question 58 of 100

58. Question

1 points

Localized lack of sharpness on a radiograph may be diagnosed with which of the following tests?

Wire mesh test
Pinhole camera test
Use of a digital dosimeter to determine HVL
Use of a digital dosimeter to determine exposure linearity

Question 59 of 100

59. Question

1 points

X-ray beam quantity is expressed in terms of:

Half value layer
Exposure linearity
Exposure reproducibility
mAs

Question 60 of 100

60. Question

1 points

The accuracy of collimation at a 40- inch SID must be:

# 4inches
# 8/10 inch
#1 inch
#1/10 inch

Question 61 of 100

61. Question

1 points

The accuracy of kVp at 80 kVp must be:

No lower than 75 kVp and no higher than 85 kVp
No lower than 79 kVp and no higher than 81 kVp
No lower than 76 kVp and no higher than 84 kVp
No lower than 78 kVp and no higher than 82 kVp

Question 62 of 100

62. Question

1 points

The apparent size of the focal spot as viewed by the image receptor is called the

Actual focal spot decreases
Effective focal spot increases
Actual focal spot increases
Effective focal spot decreases

Question 63 of 100

63. Question

1 points

Which of the following interactions is the primary source of diagnostic x-rays?

Photoelectric effect
Breamstrahlung
Compton
Pair production

Question 64 of 100

64. Question

1 points

Which of the following interactions is the primary source of diagnostic x-rays?

Photoelectric effect
Breamsstrahlung
compton
Pair production

Question 65 of 100

65. Question

1 points

Which set of exposure factors would produce the greater density?

100 mAs,70 kVp,0.5-mm focal spot,60 -inch SID
200 mAs,60 kVp,1.2-mm focal spot,60 -inch SID
100 mAs,70 kVp,1.2-mm focal spot,60 -inch SID
300 mAs,90 kVp,0.5-mm focal spot,60 -inch SID

Question 66 of 100

66. Question

1 points

Which set of exposures factors would produce the greatest density?

80 mAs,85 kVp, 40 inch SID,1.2-mm focal spot
40 mAs,80 kVp, 40 inch SID,0.5-mm focal spot
160 mAs, 80 kVp, 40 inch SID,0.5-mm focal spot
160 mAs, 90 kVp, 40 inch SID,0.5-mm focal spot

Question 67 of 100

67. Question

1 points

The components of a grid are:

Pb strips and Pb interspacers
AI strips and Pb interspacers
Pb strips and AI interspacers
Pb strips and cardboard interspacers

Question 68 of 100

68. Question

1 points

What is the purpose of a grid?

To remove scatter radiation from the primary beam
To decrease radiographic contrast
To decrease dose to the patient
To remove scatter radiation from the remnant beam

Question 69 of 100

69. Question

1 points

Which of the following list of substances that make up the human body best places them in incresing order of density?

Air, fat, water, muscle, bone
Bone, muscle, water,fat,air
Air, fat, muscle,water, bone
Air,fat,water,muscle,bone,tooth enamel

Question 70 of 100

70. Question

1 points

Bit depth describes:

The available gray scale of an imaging system
Window level
Spatial resolution
Optimum exposure needed for an imaging system

Question 71 of 100

71. Question

1 points

If it is necessary to reduce radiographic density by half, and it is impossible to do so by changing mAs ,the radiographer may:

Reduce SID by half
Double SID
Decrease kVp by 15%
Decrease kVp by 50%

Question 72 of 100

72. Question

1 points

Compared with film, the dynamic range for digital imaging is:

Wider
Narrower
The same

Question 73 of 100

73. Question

1 points

Grid cutoff may be described as:

Grid efficiency
Absorption of scatter radiation
H/D
Absorption of primary rays

Question 74 of 100

74. Question

1 points

Dynamic range is defined as:

The range of exposures over which a detector can acquire image data
Exposure latitude
Window width
Window level

Question 75 of 100

75. Question

1 points

Modulation transfer function (MTF) is:

The controlling factor of contrast resolution
A measure of the ability of the system to preserve signal contrast as a function of the spatial resolution
A function of exposure
A function of pixel density

Question 76 of 100

76. Question

1 points

2n(where n equals the number of bits) defines:

Pixel density
Shades of gray
Bit depth
Director element size

Question 77 of 100

77. Question

1 points

A scintillator:

Absorbs x-ray energy and emits part of that energy is visible light
Absorbs x-ray energy and emits that energy as electrons
Converts visible light to electrons
Convert electrons into visible light

Question 78 of 100

78. Question

1 points

The magnitude of the signal differences in the remnant beam refers to:

Subject contrast
IP contrast
Window level
Spatial resolution

Question 79 of 100

79. Question

1 points

A term used to describe the mathematical formula used by the computer to restrict the image

Bit depth
Algorithm
Mathematical function
Exposure equation

Question 80 of 100

80. Question

1 points

When speed is essential in completing an imaging examination , the prefered IR is:

CR
Film screen
DDR
Wireless DDR plate

Question 81 of 100

81. Question

1 points

Pixel is an acronym meaning:

Director element
picture element
Volume element
Bit element

Question 82 of 100

82. Question

1 points

Improper use of grids with a digital imaging system may cause an artifact known as:

Moire pattern
Grid cutoff
Motion artifact
Quantum mottle

Question 83 of 100

83. Question

1 points

An integrated systems of images and information is called:

DICOM
DDR
CR/ DDR
PACS

Question 84 of 100

84. Question

1 points

Image noise may be described as:P

Undesirable fluctuations in brightness
Undesirable fluctuations in contrast
Inadequate spatial resolution
A function of mAs

Question 85 of 100

85. Question

1 points

The measurement of the luminance of a monitor is called:

Density
Contrast
Brightness
Detail visibility

Question 86 of 100

86. Question

1 points

Grid radius is:

The total amount of lead in a grid
The range of SIDs that may be usedwith a focused grid
The objective plane
H/D

Question 87 of 100

87. Question

1 points

Visibility of an object’s edge may be limited by:

Speed class
Modulation transfer function
Contrast resolution
Quantum noise

Question 88 of 100

88. Question

1 points

Detective quantum efficiency indicates:

Patient dose
Potential speed class
Spatial resolution
Contrast resolution

Question 89 of 100

89. Question

1 points

Digital receptors have what kind of response to exposure?

Nonlinear
Linear
Curvilinear
Hyperlinear

Question 90 of 100

90. Question

1 points

If an angle on the anode is decreased,what effect is there on recorded detail?

Increase
Decrease
No appreciable effect

Question 91 of 100

91. Question

1 points

If mAs is increased by four times,what is the effect on radiographic contrast?

Increase
Decrease
No appreciable effect

Question 92 of 100

92. Question

1 points

If SID is increased,what is the effect on density?

Increase
Decrease
No appreciable effect

Question 93 of 100

93. Question

1 points

If SID is increased,what is the effect on recorded detail?

Increase
Decrease
No appreciable effect

Question 94 of 100

94. Question

1 points

A photodiode converts:

AC to DC
Light into a charge
Electrons into light
MRI signals into PACS data

Question 95 of 100

95. Question

1 points

If kVp is incresed, what happens to radiographic contrast?

Increase
Decrease
No appreciable effect

Question 96 of 100

96. Question

1 points

Amorphous silicon is used in:

AECs
OSL badges
Flat panel detectors
Rectifiers

Question 97 of 100

97. Question

1 points

In a conversion from nongrid to a 12: 1 grid, what happens to radiographic contrast?

Increase
Decrease
No appreciable effect

Question 98 of 100

98. Question

1 points

If SID is decresed from 60 inches to 30 inches, what happens to magnification?

Increase
Decrease
No appreciable effect

Question 99 of 100

99. Question

1 points

If kVp is decreased, what happens to recorded detail?

Increase
Decrease
No appreciable effect

Question 100 of 100

100. Question

1 points

If the IR is removed from tabletop to Bucky, what happens to recorded detail?

Increase
Decrease
No appreciable effect

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