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Davies Questions 570-598 > Quality Assurance/Quality Control of Equipment > Flashcards

Quality Assurance/Quality Control of Equipment Flashcards

1
Q

The purpose of the SMPTE test pattern is to :
A. Determine transducer sensitivity
B. Measure penetration
C. Measure axial resolution
D. Measure lateral resolution
E. Aid in the setup and quality assurance of displays and cameras

A

E. Aid in the setup and quality assurance of displays and cameras

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2
Q

What conclusion can be reached by comparing the rods labeled A and B in this phantom image? Pg 132
A. Lateral resolution has deteriorated with depth
B. Elevational resolution has deteriorated with depth
C. Lateral resolution is best with rods labeled B
D. Axial resolution is best with rods labeled B

A

A. Lateral resolution has deteriorated with depth

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3
Q 
The graphic overlay on this phantom image represents a gray-scale assignment curve. What type of curve is being used? Pg133 #572
A. S-curve
B. Root curve
C. Linear curve
D. Light curve
A

C. Linear curve

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4
Q 
The rods depicted by the arrows in this phantom are used to determine what feature of the machine? pg 133 #573
A. Contrast resolution
B. Penetration
C. Lateral resolution
D. Measurement accuracy
E. Axial resolution
A

E. Axial resolution

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5
Q 
In this phantom image, two fluid-filled tubes are present. What type of resolution is being evaluated?
Pg 134 #574
A. Axial
B. Lateral
C. Contrast
D. Elevational
A

D. Elevational

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6
Q

You are using a conventional linear array transducer to image the phantom in the previous question (574 pg133). Why does the tube labeled B contain echoes, whereas the tube labeled A does not?
A. Since axial resolution decreases with depth, artifactual echoes are displayed from above and below the tube
B. The frame rate is too slow to display the deeper tube accurately
C. The slice-thickness resolution at the level of tube B is worse than that at the level of tube A
D. The electronic focusing at the level of tube A is more powerful than that at the level of tube B

A

C. The slice-thickness resolution at the level of tube B is worse than that at the level of tube A

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7
Q 
Which of the following should be regularly checked as a component of a quality control program?
A. System penetration
B. Image uniformity
C. Assurance of electric safety
D. Distance measurement accuracy
E. All of the above
A

E. All of the above

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8
Q 
What is being measured on the three rods in the center of this image? pg 135
A. Axial Resolution
Penetration
C. Elevational resolution
D. Lateral resolution
A

D. Lateral resolution

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9
Q

What is meant by the “dead-zone” in performance testing?
A. B-mode penetration distance
B. Level at which ultrasound signal is the same strength as the electronic noise
C. Doppler signal obtained at 90*
D. Doppler penetration distance
E. Distance from the transducer to the first identifiable echo

A

E. Distance from the transducer to the first identifiable echo

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10
Q

Which of the following describes sensitivity?
A. Ability of the system to detect weak echoes
B. Ability of the system to demonstrate highly reflective interfaces
C. Ability to the system to differentiate between two different structures with slightly varying amplitudes
D. Ability of the system to distinguish between two closely spaced structures parallel to the beam

A

A. Ability of the system to detect weak echoes

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11
Q

These two phantom images were obtained with maximum gain and acoustic power using two different transducers. What information can be obtained by this comparison ? pg 136
A. Transducer A has less penetration than transducer B
B. Lateral resolution is best with transducer B
C. Axial resolution is best with transducer B
D. B and C only
E. All of the above

A

A. Transducer A has less penetration than transducer B

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12
Q 
String test objects are used to evaluate:
A. Contrast resolution
B. Axial resolution
C. Doppler accuracy
D. Elevational resolution
A

C. Doppler accuracy

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13
Q 
A hydrophone measures:
A. Acoustic pressure output
B. Doppler accuracy
C. Penetration
D. Contrast resolution
A

A. Acoustic pressure output

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14
Q

Which best describes the effect of damaged transducer elements in the B-mode image?
A. Dark vertical bands beginning at the top of the image
B. Brightimage
C. Cold transducer
D. Decreased frame rate

A

A. Dark vertical bands beginning at the top of the image

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15
Q 
Transducers  should NOT be cleaned with:
A. Soap and water
B. Ultraviolet light (or radiation)
C. An autoclave
D. Gas
E. Cidex
A

E. Cidex

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16
Q 
What letter represents the strain reliefportion of the transducer?
A
B
C
D
E
A

B

17
Q 
Use of a transducer should be discontinued if a crack appears in the following area
A
B
C
D
E. All of the above
A

E. All of the above

18
Q 
The transducer lens, which may be easily damaged by mechanical shock, is represented by letter Pg 137:
A
B
C
D
E
A

D

19
Q

The repetitive pattern seen in the far field of this image is most likely a result of: Pg 138
A. Damage to the lens or transducer crystals
B. Electric interference pattern
C. Damaged connector pins
D. Malfunction of the transmitter
E. None of the above

A

C. Damaged connector pins

20
Q

What maintenance issue is demonstrated in this image? Pg 138 #589
A. Damage to the lens or transducer crystals
B. Electric interference pattern
C. Damaged connector pins
D. Malfunction of the transmitter
E. None of the above

A

A. Damage to the lens or transducer crystals

21
Q

The end result of the issue from Damage to the lens or transducer crystals is:
A. Degradation of image quality
B. Underestimation of maximum flow velocity
C. Electric shock
D. Overheating
E. A and B

A

E. A and B

22
Q 
Which of the following is a commonly recommended ingredient in cleansers for intracavitary probes?
A. Acetone
B. Iodine
C. Betadine
D. Bleach
E. Glutaraldehyde
A

E. Glutaraldehyde

23
Q 
An ultrasound system preventative maintenance program should include:
A. Cleaning of air filters
B. Visual inspection of probes
C. Transducer testing
D. External cleaning of the system
E. All of the above
A

E. All of the above

24
Q 
What can you test with a Doppler flow phantom?
A. Range-gate accuracy
B. Spectral Doppler velocity accuracy
C. Color Doppler penetration
D. A and B only
E. All of the above
A

E. All of the above

25
Q 
This phantom is used to detect: Pg 140
A. Lateral resolution
B. Axial resolution
C. Slice thickness
D. Dead zone
E. Contrast resolution
A

C. Slice thickness

26
Q

In an ultrasound phantom, the targets typically used for measuring axial resolution are:
A. Multiple round fluid-filled structures
B. Multiple round hyperechoic simulated lesions
C. Multiple equidistant rods
D. Closely spaced targets of varying distances

A

D. Closely spaced targets of varying distances

27
Q 
Measuring the lateral width of a target on an ultrasound phantom is most closely related to:
A. Lateral resolution
B. Contrast resolution 
C. Elevational resolution
D. Axial resolution
E. temporal RESOLUTION
A

A. Lateral resolution

28
Q

You are using a transducer with poor elevational resolution. What problem will most likely be encountered as a result?
A. Small structures closely spaced together along the path of the beam will not be separated
B. Two closely spaced structures in a plane perpendicular to the beam will not be separated
C. You will not be able to accurately measure structures oriented perpendicular to the beam
D. You will not be able to clear an anechoic tube oriented with its axis in the scan plane

A

D. You will not be able to clear an anechoic tube oriented with its axis in the scan plane

29
Q 
When measuring penetration on a tissue -mimicking phantom, how should you adjust the receiver gain and acoustic output?
A. Minimum gain, maximum acoustic output
B. Maximum gain, maximum acoustic output
C. Maximum gain, minimum acoustic output
D. Minimum gain, minimum acoustic output
A

B. Maximum gain, maximum acoustic output

Davies Questions 570-598 (1 decks)

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