ARDMS SPI EXAM
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Question 1: 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
Answer:
C. autocorrelation . autocorrelation b is incorrect because fast Fourier
Question 2: 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 The
range for ultrasound begins:
A. 20 Hz
B. 20,000 Hz
C. 2 MHz
D. 15 MHz
Answer:
B. 20,000 Hz . 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
Question 3: 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
Answer:
D. transmit gain . transmit gain; amplitude can be affected by the sonographer
Question 4: transmit gain; amplitude can be affected by the
sonographer Pulse repetition frequency - 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 The best
way to increase the near field length of an ultrasound beam is to: -
increase transducer diameter 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 The percentage of
time that the ultrasound instrument is emitting ultrasound is called:
A. PRF
B. pulse duration
C. pulse repetition period
D. duty factor
Answer:
D. duty factor . duty factor; the maximum value is 1, the minimum is 0
Question 5: duty factor; the maximum value is 1, the minimum is 0
The unit of duty factor is: a. Hz b. mm c. ms d. unitless - d. unitless
Quality Factor= Fundamental frequency/ bandwidth - This allows
doses of different types of radiation to be compared for their
,biological effects. Clinical imaging transducers are: - wide
bandwidth; low q factor Power/area= - Intensity With pulse wave
Doppler axial resolution: - degrades What color is usually use in
color flow Doppler variance map to indicate turbulent flow? - green
Which gain will increase the risk of bioeffects?
A. transmi t
B. receive
C. gain
D. overall gain
Answer:
A. transmi t . transmi
Question 6: transmi t Which of the following is considered the
memory of an ultrasound instrument?
A. pulser
B. transducer
C. receive r
D. beam forme r
E. digital scan convert e r
F. display monitor
Answer:
E. digital scan convert e r . digital scan converte
Question 7: digital scan converte r Spectral broadening suggest:
A. laminar flo w
B. turbulent flo w
C. flow away from the transducer
D. flow towards the transducer
, Answer:
B. turbulent flo w . turbulent flow
Question 8: turbulent flow Doppler high pass filter eliminates: -
high amplitude signals; low velocity flow The Doppler wall filter is
considered a: - high pass filter The Nyquist Limit is equal to:
A. propagation speed x frequency
B. propagation speed/ wavelength
C. PRF/2
D. 4xV^2
Answer:
C. PRF/2 . PRF/2
Question 9: 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 - 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 - 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
Answer:
E. absence of sampling rate . absence of sampling rate
Question 10: absence of sampling rate A mechanical transducer
utilizes:
COMPLETE QUESTIONS AND DETAILED SOLUTIONS
LATEST UPDATE THIS YEAR JUST RELEASED
Question 1: 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
Answer:
C. autocorrelation . autocorrelation b is incorrect because fast Fourier
Question 2: 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 The
range for ultrasound begins:
A. 20 Hz
B. 20,000 Hz
C. 2 MHz
D. 15 MHz
Answer:
B. 20,000 Hz . 20,000 Hz (useful frequency range for clinical imaging is
2MHz-10MHz)
Question 3: 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
Answer:
D. transmit gain . transmit gain; amplitude can be affected by the sonographer
Question 4: transmit gain; amplitude can be affected by the
sonographer Pulse repetition frequency - 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 The best
way to increase the near field length of an ultrasound beam is to: -
increase transducer diameter 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 The percentage of
time that the ultrasound instrument is emitting ultrasound is called:
A. PRF
B. pulse duration
C. pulse repetition period
D. duty factor
Answer:
D. duty factor . duty factor; the maximum value is 1, the minimum is 0
Question 5: duty factor; the maximum value is 1, the minimum is 0
The unit of duty factor is: a. Hz b. mm c. ms d. unitless - d. unitless
Quality Factor= Fundamental frequency/ bandwidth - This allows
doses of different types of radiation to be compared for their
,biological effects. Clinical imaging transducers are: - wide
bandwidth; low q factor Power/area= - Intensity With pulse wave
Doppler axial resolution: - degrades What color is usually use in
color flow Doppler variance map to indicate turbulent flow? - green
Which gain will increase the risk of bioeffects?
A. transmi t
B. receive
C. gain
D. overall gain
Answer:
A. transmi t . transmi
Question 6: transmi t Which of the following is considered the
memory of an ultrasound instrument?
A. pulser
B. transducer
C. receive r
D. beam forme r
E. digital scan convert e r
F. display monitor
Answer:
E. digital scan convert e r . digital scan converte
Question 7: digital scan converte r Spectral broadening suggest:
A. laminar flo w
B. turbulent flo w
C. flow away from the transducer
D. flow towards the transducer
, Answer:
B. turbulent flo w . turbulent flow
Question 8: turbulent flow Doppler high pass filter eliminates: -
high amplitude signals; low velocity flow The Doppler wall filter is
considered a: - high pass filter The Nyquist Limit is equal to:
A. propagation speed x frequency
B. propagation speed/ wavelength
C. PRF/2
D. 4xV^2
Answer:
C. PRF/2 . PRF/2
Question 9: 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 - 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 - 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
Answer:
E. absence of sampling rate . absence of sampling rate
Question 10: absence of sampling rate A mechanical transducer
utilizes:
