ARDMS SPI Exam All Questions &
Answers (Graded A+)
Which gain will increase the risk of bioeffects?
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a. transmit
j.
b. receivej.
c. gain j.
d. overall gain - (correct answer) -a. transmit
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Which of the following is considered the memory of an ultrasound instrument?
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a. pulser j.
b. transducer
j.
c. receiver
j.
d. beam former
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e. digital scan converter
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f. display monitor - (correct answer) -e. digital scan converter
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Spectral broadening suggest: j. j.
a. laminar flow
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b. turbulent flow
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c. flow away from the transducer
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d. flow towards the transducer - (correct answer) -b. turbulent flow
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With pulse wave Doppler axial resolution: - (correct answer) -degrades
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What color is usually use in color flow Doppler variance map to indicate turbulent flow? -
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(correct answer) -green j. j.
Doppler high pass filter eliminates: - (correct answer) -high amplitude signals; low velocity
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flow
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The Doppler wall filter is considered a: - (correct answer) -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
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c. PRF/2 j.
d. 4xV^2 - (correct answer) -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
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b. ring down
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c. slice thickness artifact
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d. multipath - (correct answer) -b. ring down
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An increase in red blood cell velocity will_____ the Doppler Shift:
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a. increase
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b. decrease
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c. not change
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d. cannot be predicted - (correct answer) -a. increase
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The primary advantage of CW Doppler is:
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a. range resolution
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b. range discrimination
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c. range ambiguity
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d. range gating
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e. absence of sampling rate - (correct answer) -e. absence of sampling rate
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The range for ultrasound begins:
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a. 20 Hz j. j.
b. 20,000 Hz
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c. 2 MHz j. j.
d. 15 MHz - (correct answer) -b. 20,000 Hz (useful frequency range for clinical imaging is
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2MHz-10MHz)
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Which instrument control affects the amplitude (dB) of the outgoing signal:
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a. gain j.
b. receiver gain
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c. TGC j.
d. transmit gain
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e. overall gain - (correct answer) -d. transmit gain; amplitude can be affected by the
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sonographer
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Which of the following is used to convert Doppler shift information into color:
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a. high PRF
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b. fast Fourier transform
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c. autocorrelation
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d. time interval histogram - (correct answer) -c. autocorrelation
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b is incorrect because fast Fourier transform is the method used to process conventional
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Doppler shift information but is too slow a method for color Doppler
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Pulse repetition frequency - (correct answer) -Number of pulses that an ultrasound system
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transmits into the body each second. Hz. Typically 4-15 KHz. PRF and depth of a view are
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inversely related: When system is imaging deeper, the pulse repetition frequency is lower.
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Also the number of pulses created each second
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