ARDMS SPI Exam
Study online at https://quizlet.com/_qp1ws
1. Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain: a. transmit
2. Which of the following is considered the memory of an ultrasound instru-
ment?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor: e. digital scan converter
3. Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer: b. turbulent flow
4. With pulse wave Doppler axial resolution:: degrades
5. What color is usually use in color flow Doppler variance map to indicate
turbulent flow?: green
6. Doppler high pass filter eliminates:: high amplitude signals; low velocity flow
7. The Doppler wall filter is considered a:: high pass filter
8. The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2: c. PRF/2
9. Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath: b. ring down
10. An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted: a. increase
1/6
, ARDMS SPI Exam
Study online at https://quizlet.com/_qp1ws
11. The primary advantage of CW Doppler is:
a. range resolution
b. range discrimination
c. range ambiguity
d. range gating
e. absence of sampling rate: e. absence of sampling rate
12. The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz: b. 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
13. Which instrument control affects the amplitude (dB) of the outgoing sig-
nal:
a. gain
b. receiver gain
c. TGC
d. transmit gain
e. overall gain: d. transmit gain; amplitude can be affected by the sonographer
14. 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: c. autocorrelation
b is incorrect because fast Fourier transform is the method used to process conven-
tional Doppler shift information but is too slow a method for color Doppler
15. Pulse repetition frequency: Number of pulses that an ultrasound system trans-
mits 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
16. The best way to increase the near field length of an ultrasound beam is
to:: increase transducer diameter
17. The range of frequencies produced by a damped PZT element is called:
a. fundamental frequencies
b. Q Factor
c. near field
d. bandwith: d. bandwidth
2/6
Study online at https://quizlet.com/_qp1ws
1. Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain: a. transmit
2. Which of the following is considered the memory of an ultrasound instru-
ment?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor: e. digital scan converter
3. Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer: b. turbulent flow
4. With pulse wave Doppler axial resolution:: degrades
5. What color is usually use in color flow Doppler variance map to indicate
turbulent flow?: green
6. Doppler high pass filter eliminates:: high amplitude signals; low velocity flow
7. The Doppler wall filter is considered a:: high pass filter
8. The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2: c. PRF/2
9. Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath: b. ring down
10. An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted: a. increase
1/6
, ARDMS SPI Exam
Study online at https://quizlet.com/_qp1ws
11. The primary advantage of CW Doppler is:
a. range resolution
b. range discrimination
c. range ambiguity
d. range gating
e. absence of sampling rate: e. absence of sampling rate
12. The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz: b. 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
13. Which instrument control affects the amplitude (dB) of the outgoing sig-
nal:
a. gain
b. receiver gain
c. TGC
d. transmit gain
e. overall gain: d. transmit gain; amplitude can be affected by the sonographer
14. 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: c. autocorrelation
b is incorrect because fast Fourier transform is the method used to process conven-
tional Doppler shift information but is too slow a method for color Doppler
15. Pulse repetition frequency: Number of pulses that an ultrasound system trans-
mits 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
16. The best way to increase the near field length of an ultrasound beam is
to:: increase transducer diameter
17. The range of frequencies produced by a damped PZT element is called:
a. fundamental frequencies
b. Q Factor
c. near field
d. bandwith: d. bandwidth
2/6
