Davies SPI Exam Practice Questions
with Approved Answers| Latest
2025/2026| 100% Correct.
What is the optimal thickness for the matching layer? 1/4 of a
wavelength
For a linear array transducer consisting of a single row of
elements, what method is most used to focus the beam in the
elevational direction? mechanical focusing
acoustic impedence increases with which of the following?
increased tissue density and propagation speed
When scanning with pulsed-wave Doppler you would affect the
acoustic exposure by changing which of the following? PRF
the maximum cyclical change in a quantity is known as
amplitude
Ultrasound propagation velocity depends on: Density and
compressibility
,Which intensity parameter is not applicable for a continuous-wave
ultrasound? SPPA & SAPA
Which transducer will exhibit the LEAST amount of volume
averaging? a 1.5D or multirow array
The ability to distinguish between adjacent structures that
produce echoes of similar amplitude is termed contrast
resolution
What array transducer fires all of the elements for each acoustic
scan line, using small time delays to steer the beam? phased
array
what is an advantage of single-crystal or pure-wave crystal
transducers? wide bandwidth
When the sound beam is refracted during a sonographic
examination which of the following might you detect on the
ultrasound image? lateral misregistration
, which of the following best describes the f-number? focal
length divided by the aperature
you may observe sound attenuation by all of the following except
compression
the propagation speed for sound is the lowest in which of the
following biological tissues? fat
Increasing the frequency on a multifrequency transducer from
3.5MHz to 5.0MHz will: decrease the wavelength
Which phenomenon is associated with a pattern produced by a
sound beam after passing through a small aperture?
diffraction
You can reduce beam width to improve spatial resolution in the
image by which of the following? focusing
you suspect that a bright spot on the b-mode image is
calcification, but posterior acoustic shadow is not present. how
can you best optimize your system to demonstrate a shadow
distal to the calcification? increase the transducer frequency
with Approved Answers| Latest
2025/2026| 100% Correct.
What is the optimal thickness for the matching layer? 1/4 of a
wavelength
For a linear array transducer consisting of a single row of
elements, what method is most used to focus the beam in the
elevational direction? mechanical focusing
acoustic impedence increases with which of the following?
increased tissue density and propagation speed
When scanning with pulsed-wave Doppler you would affect the
acoustic exposure by changing which of the following? PRF
the maximum cyclical change in a quantity is known as
amplitude
Ultrasound propagation velocity depends on: Density and
compressibility
,Which intensity parameter is not applicable for a continuous-wave
ultrasound? SPPA & SAPA
Which transducer will exhibit the LEAST amount of volume
averaging? a 1.5D or multirow array
The ability to distinguish between adjacent structures that
produce echoes of similar amplitude is termed contrast
resolution
What array transducer fires all of the elements for each acoustic
scan line, using small time delays to steer the beam? phased
array
what is an advantage of single-crystal or pure-wave crystal
transducers? wide bandwidth
When the sound beam is refracted during a sonographic
examination which of the following might you detect on the
ultrasound image? lateral misregistration
, which of the following best describes the f-number? focal
length divided by the aperature
you may observe sound attenuation by all of the following except
compression
the propagation speed for sound is the lowest in which of the
following biological tissues? fat
Increasing the frequency on a multifrequency transducer from
3.5MHz to 5.0MHz will: decrease the wavelength
Which phenomenon is associated with a pattern produced by a
sound beam after passing through a small aperture?
diffraction
You can reduce beam width to improve spatial resolution in the
image by which of the following? focusing
you suspect that a bright spot on the b-mode image is
calcification, but posterior acoustic shadow is not present. how
can you best optimize your system to demonstrate a shadow
distal to the calcification? increase the transducer frequency
