ARDMS SPI EXAM LATEST REAL EXAM 150+
QUESTIONS AND CORRECT ANSWERS|AGRADE
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
QUESTIONS AND CORRECT ANSWERS|AGRADE
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
