ARDMS SPI EXAM VERSION A REAL EXAM
2024-2025 QUESTIONS AND CORRECT
ANSWERS|GRADED A+
Multiple echoes, equally spaced originating from a gas bubble is
called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath - ANSWER-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 - ANSWER-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
The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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: - ANSWER-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 - ANSWER-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; the maximum value is 1, the
minimum is 0
The unit of duty factor is:
a. Hz
b. mm
c. ms
d. unitless - ANSWER-d. unitless
Quality Factor= Fundamental frequency/ bandwidth - ANSWER-This
allows doses of different types of radiation to be compared for their
biological effects.
Clinical imaging transducers are: - ANSWER-wide bandwidth; low q
factor
Power/area= - ANSWER-Intensity
Increasing wavelength will ___________ frequency.
a. increase
b. decrease
c. not change
d. cannot be predicted. - ANSWER-b. decrease
All of the following directly affect frame rate except:
2024-2025 QUESTIONS AND CORRECT
ANSWERS|GRADED A+
Multiple echoes, equally spaced originating from a gas bubble is
called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath - ANSWER-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 - ANSWER-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
The range for ultrasound begins:
a. 20 Hz
b. 20,000 Hz
c. 2 MHz
d. 15 MHz - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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: - ANSWER-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 - ANSWER-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; the maximum value is 1, the
minimum is 0
The unit of duty factor is:
a. Hz
b. mm
c. ms
d. unitless - ANSWER-d. unitless
Quality Factor= Fundamental frequency/ bandwidth - ANSWER-This
allows doses of different types of radiation to be compared for their
biological effects.
Clinical imaging transducers are: - ANSWER-wide bandwidth; low q
factor
Power/area= - ANSWER-Intensity
Increasing wavelength will ___________ frequency.
a. increase
b. decrease
c. not change
d. cannot be predicted. - ANSWER-b. decrease
All of the following directly affect frame rate except:
