Answers
Which gain will increase the risk of bioeffects?
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a. transmit
d
b. receive
d
c. gain
d
d. overall gain - a. transmit
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Which of the following is considered the memory of an ultrasound instrument?
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a. pulserd
b. transducer
d
c. receiver
d
d. beam former
d d
e. digital scan converter
d d d
f. display monitor - e. digital scan converter
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Spectral broadening suggest:
d d
a. laminar flow
d d
b. turbulent flow
d d
, c. flow away from the transducer
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d. flow towards the transducer - b. turbulent flow
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With pulse wave Doppler axial resolution: - degrades
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What color is usually use in color flow Doppler variance map to indicate turbulent flow? - green
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Doppler high pass filter eliminates: - high amplitude signals; low velocity flow
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The Doppler wall filter is considered a: - high pass filter
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The Nyquist Limit is equal to:
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a. propagation speed x frequency
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b. propagation speed/ wavelength
d d d
c. PRF/2
d
d. 4xV^2 - c. PRF/2
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Multiple echoes, equally spaced originating from a gas bubble is called:
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a. comet tail
d d
b. ring down
d d
c. slice thickness artifact
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d. multipath - b. ring down
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An increase in red blood cell velocity will_____ the Doppler Shift:
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a. increase
d
b. decrease
d
c. not change
d d
d. cannot be predicted - a. increase
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