ARDMS SPI Exam 2022/2023 With Complete Solutions
Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain Correct Ans - a. transmit
Which of the following is considered the memory of an ultrasound instrument?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor Correct Ans - e. digital scan converter
Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer Correct Ans - b. turbulent flow
With pulse wave Doppler axial resolution: Correct Ans - degrades
What color is usually use in color flow Doppler variance map to indicate turbulent flow?
Correct Ans - green
Doppler high pass filter eliminates: Correct Ans - high amplitude signals; low
velocity flow
The Doppler wall filter is considered a: Correct Ans - high pass filter
The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2 Correct Ans - c. PRF/2
Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
, d. multipath Correct Ans - b. ring down
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted Correct Ans - a. increase
The primary advantage of CW Doppler is:
a. range resolution
b. range discrimination
c. range ambiguity
d. range gating
e. absence of sampling rate Correct Ans - e. absence of sampling rate
The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz Correct Ans - b. 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
Which instrument control affects the amplitude (dB) of the outgoing signal:
a. gain
b. receiver gain
c. TGC
d. transmit gain
e. overall gain Correct Ans - d. transmit gain; amplitude can be affected by the
sonographer
Which of the following is used to convert Doppler shift information into color:
a. high PRF
b. fast Fourier transform
c. autocorrelation
d. time interval histogram Correct Ans - c. autocorrelation
b is incorrect because fast Fourier transform is the method used to process conventional
Doppler shift information but is too slow a method for color Doppler
Pulse repetition frequency Correct Ans - Number of pulses that an ultrasound system
transmits into the body each second. Hz. Typically 4-15 KHz. PRF and depth of a view
are inversely related: When system is imaging deeper, the pulse repetition frequency is
lower.
Also the number of pulses created each second
Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain Correct Ans - a. transmit
Which of the following is considered the memory of an ultrasound instrument?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor Correct Ans - e. digital scan converter
Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer Correct Ans - b. turbulent flow
With pulse wave Doppler axial resolution: Correct Ans - degrades
What color is usually use in color flow Doppler variance map to indicate turbulent flow?
Correct Ans - green
Doppler high pass filter eliminates: Correct Ans - high amplitude signals; low
velocity flow
The Doppler wall filter is considered a: Correct Ans - high pass filter
The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2 Correct Ans - c. PRF/2
Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
, d. multipath Correct Ans - b. ring down
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted Correct Ans - a. increase
The primary advantage of CW Doppler is:
a. range resolution
b. range discrimination
c. range ambiguity
d. range gating
e. absence of sampling rate Correct Ans - e. absence of sampling rate
The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz Correct Ans - b. 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
Which instrument control affects the amplitude (dB) of the outgoing signal:
a. gain
b. receiver gain
c. TGC
d. transmit gain
e. overall gain Correct Ans - d. transmit gain; amplitude can be affected by the
sonographer
Which of the following is used to convert Doppler shift information into color:
a. high PRF
b. fast Fourier transform
c. autocorrelation
d. time interval histogram Correct Ans - c. autocorrelation
b is incorrect because fast Fourier transform is the method used to process conventional
Doppler shift information but is too slow a method for color Doppler
Pulse repetition frequency Correct Ans - Number of pulses that an ultrasound system
transmits into the body each second. Hz. Typically 4-15 KHz. PRF and depth of a view
are inversely related: When system is imaging deeper, the pulse repetition frequency is
lower.
Also the number of pulses created each second
