2024 SPI PRACTICE EXAM
QUESTIONS WITH CORRECT
ANSWERS
Sound waves are: - CORRECT-ANSWERSlongitudinal, mechanical
The speed of sound in soft tissue is closest to: - CORRECT-ANSWERS1,500
m/s
The frequency closest to the lower limit of ultrasound is: - CORRECT-
ANSWERS15,000 Hz
Which is not an acoustic variable? - CORRECT-ANSWERSintensity
What best describes the features of a sound wave and medium that
determine the speed of sound? - CORRECT-ANSWERSdensity and stiffness
Which of these biologic tissues will sound waves propagate most quickly? -
CORRECT-ANSWERStendon
How much bigger is a billion than a thousand? - CORRECT-
ANSWERS1,000,000
Which of the following transducers will create sound with the lowest
frequency? - CORRECT-ANSWERSthick crystal, PZT in which sound travels
slowly
Which of the following transducers will create a sound beam with the least
amount of divergence? - CORRECT-ANSWERShigh frequency, large diameter
All of the following describe dynamic range EXCEPT: logarithmic, comparison,
relative, absolute, ratio - CORRECT-ANSWERSabsolute
An ultrasound system's display is too bright. Which of the following
techniques is best to correct this problem? - CORRECT-ANSWERSdecrease
output power
In B-mode, which input is used with the amplitude of reflection? - CORRECT-
ANSWERSz-axis
,Which of the following is the cause of slice thickness artifact? - CORRECT-
ANSWERSbeam dimension greater in size than the reflector
Which of these statements is true of a 25 MHz sound pulse? - CORRECT-
ANSWERShighly attenuating, short SPL
All of the following regarding the hemodynamics of a stenosis are true
EXCEPT: - CORRECT-ANSWERSpressure is lowest downstream
What will increase signal-to-noise ratio? - CORRECT-ANSWERSincreasing
output power
Which component of an ultrasound system exposes the patient to the
greatest risk? - CORRECT-ANSWERStransducer
What is NOT related to CW wave transducers? - CORRECT-ANSWERSwide
bandwidth
Which of the following best describes demodulation of electronic signals? -
CORRECT-ANSWERSchanging the shape or form of the signal
What is related to frequency to the 4th power? - CORRECT-ANSWERSrayleigh
scattering
T/F: Shadowing artifact is unrelated to the speed of sound in a medium -
CORRECT-ANSWERStrue
In which of these media will sound travel the slowest? - CORRECT-
ANSWERShigh density, low stiffness
The general mechanism which creates harmonics is called: - CORRECT-
ANSWERSnon-linear behavior
What is NOT true regarding normal cavitation? - CORRECT-ANSWERSharmful
bioeffects are commonly observed
Which of the following choices determines the signal amplitude in the
transducer of an ultrasound? - CORRECT-ANSWERSreflected intensity
Which best describes annular array transducers? - CORRECT-
ANSWERSexcellent lateral resolution, diminished temporal resolution, sector
shaped
What determines the spatial resolution of a monitor? - CORRECT-
ANSWERSthe number of lines per frame
, Which type of transducer will have the shallowest focus? - CORRECT-
ANSWERSlow frequency, small diameter
An image is too dark. Which technique is best to correct this problem? -
CORRECT-ANSWERSincrease receiver gain
What is NOT associated with PACS? - CORRECT-ANSWERSanalog replay
Which is most likely to create cavitation? - CORRECT-ANSWERShigh peak
rarefaction pressure and low frequency
Which receiver function cannot be adjusted by the sonographer? - CORRECT-
ANSWERSdemodulation
What will NOT improve temporal resolution? - CORRECT-ANSWERSincreased
line density
Which of these terms means "many gray shades"? - CORRECT-ANSWERSwide
dynamic range
What is the accuracy of reflector depth called? - CORRECT-ANSWERSdepth
calibration
Which technique results in a 3D image? - CORRECT-ANSWERSsurface
rendering
Which control allows adjustment for attenuation at specific depths? -
CORRECT-ANSWERSTGC
What determines the center frequency of a transducer? - CORRECT-
ANSWERSthickness
How does frequency compounding improve image quality? - CORRECT-
ANSWERSreduces speckle
Which variable decreased when the number of acoustic lines per frame is
increased without changing the maximum depth? - CORRECT-
ANSWERSframe rate
Which setting of an ultrasound system gives the sonographer the ability to
display both strong and weak echoes? - CORRECT-ANSWERSdynamic range
Which factor reduces the likelihood of aliasing in pulsed wave spectral
doppler? - CORRECT-ANSWERSincreased nyquist limit
QUESTIONS WITH CORRECT
ANSWERS
Sound waves are: - CORRECT-ANSWERSlongitudinal, mechanical
The speed of sound in soft tissue is closest to: - CORRECT-ANSWERS1,500
m/s
The frequency closest to the lower limit of ultrasound is: - CORRECT-
ANSWERS15,000 Hz
Which is not an acoustic variable? - CORRECT-ANSWERSintensity
What best describes the features of a sound wave and medium that
determine the speed of sound? - CORRECT-ANSWERSdensity and stiffness
Which of these biologic tissues will sound waves propagate most quickly? -
CORRECT-ANSWERStendon
How much bigger is a billion than a thousand? - CORRECT-
ANSWERS1,000,000
Which of the following transducers will create sound with the lowest
frequency? - CORRECT-ANSWERSthick crystal, PZT in which sound travels
slowly
Which of the following transducers will create a sound beam with the least
amount of divergence? - CORRECT-ANSWERShigh frequency, large diameter
All of the following describe dynamic range EXCEPT: logarithmic, comparison,
relative, absolute, ratio - CORRECT-ANSWERSabsolute
An ultrasound system's display is too bright. Which of the following
techniques is best to correct this problem? - CORRECT-ANSWERSdecrease
output power
In B-mode, which input is used with the amplitude of reflection? - CORRECT-
ANSWERSz-axis
,Which of the following is the cause of slice thickness artifact? - CORRECT-
ANSWERSbeam dimension greater in size than the reflector
Which of these statements is true of a 25 MHz sound pulse? - CORRECT-
ANSWERShighly attenuating, short SPL
All of the following regarding the hemodynamics of a stenosis are true
EXCEPT: - CORRECT-ANSWERSpressure is lowest downstream
What will increase signal-to-noise ratio? - CORRECT-ANSWERSincreasing
output power
Which component of an ultrasound system exposes the patient to the
greatest risk? - CORRECT-ANSWERStransducer
What is NOT related to CW wave transducers? - CORRECT-ANSWERSwide
bandwidth
Which of the following best describes demodulation of electronic signals? -
CORRECT-ANSWERSchanging the shape or form of the signal
What is related to frequency to the 4th power? - CORRECT-ANSWERSrayleigh
scattering
T/F: Shadowing artifact is unrelated to the speed of sound in a medium -
CORRECT-ANSWERStrue
In which of these media will sound travel the slowest? - CORRECT-
ANSWERShigh density, low stiffness
The general mechanism which creates harmonics is called: - CORRECT-
ANSWERSnon-linear behavior
What is NOT true regarding normal cavitation? - CORRECT-ANSWERSharmful
bioeffects are commonly observed
Which of the following choices determines the signal amplitude in the
transducer of an ultrasound? - CORRECT-ANSWERSreflected intensity
Which best describes annular array transducers? - CORRECT-
ANSWERSexcellent lateral resolution, diminished temporal resolution, sector
shaped
What determines the spatial resolution of a monitor? - CORRECT-
ANSWERSthe number of lines per frame
, Which type of transducer will have the shallowest focus? - CORRECT-
ANSWERSlow frequency, small diameter
An image is too dark. Which technique is best to correct this problem? -
CORRECT-ANSWERSincrease receiver gain
What is NOT associated with PACS? - CORRECT-ANSWERSanalog replay
Which is most likely to create cavitation? - CORRECT-ANSWERShigh peak
rarefaction pressure and low frequency
Which receiver function cannot be adjusted by the sonographer? - CORRECT-
ANSWERSdemodulation
What will NOT improve temporal resolution? - CORRECT-ANSWERSincreased
line density
Which of these terms means "many gray shades"? - CORRECT-ANSWERSwide
dynamic range
What is the accuracy of reflector depth called? - CORRECT-ANSWERSdepth
calibration
Which technique results in a 3D image? - CORRECT-ANSWERSsurface
rendering
Which control allows adjustment for attenuation at specific depths? -
CORRECT-ANSWERSTGC
What determines the center frequency of a transducer? - CORRECT-
ANSWERSthickness
How does frequency compounding improve image quality? - CORRECT-
ANSWERSreduces speckle
Which variable decreased when the number of acoustic lines per frame is
increased without changing the maximum depth? - CORRECT-
ANSWERSframe rate
Which setting of an ultrasound system gives the sonographer the ability to
display both strong and weak echoes? - CORRECT-ANSWERSdynamic range
Which factor reduces the likelihood of aliasing in pulsed wave spectral
doppler? - CORRECT-ANSWERSincreased nyquist limit
