DAVIES SPI REVIEW REVIEW PACK 2026
FULLY SOLVED QUESTION SET
◉ During production of a sonogram you image blood, bile, soft
tissue, calcification and muscle. Which is the MOST attenuating?
Answer: Calcification
◉ Axial resolution is determined chiefly by?
Answer: Pulse duration
The shorter the pulse duration, the better the axial resolution
◉ The transfer of acoustic energy into heat is termed?
Answer: Absorption
◉ With A-mode, the strength of the echo signal is represented by:
Answer: The height of the spike
◉ What is the main advantage of using an intracavitary probe
compared to a standard transducer?
,Answer: Since the intracavitary probe is closer to the AOI, a higher
frequency transducer can be used, resulting in superior spatial
resolution.
◉ Absorption, scattering and attenuation all increases as
___________increases?
Answer: Frequency
◉ You notice that the image in the far field is less bright compared to
the near field. This is due to:
Answer: Sound attenuation
◉ The dark area (shadowing) underneath gallstones is primarily
due to:
Answer: Increased attenuation
◉ You are performing a sonographic exam with a wide-bandwidth
transducer. The advantage you obtain with this transducer
compared to a narrow-band transducer is:
Answer: Improved axial resolution
◉ Other names for axial resolution:
Answer: LARRD: longitudinal, axial, range, radial, and depth
, ◉ Dynamic receive focusing uses:
Answer: Time delays before echo signals from array elements are
combined
With dynamic receive focusing, the echoes that are received first are
held in delay circuitry until all of the
echoes from the same depth have been received. This results in
constructive interference of the waves and produces a higher
amplitude
and more focused signal.
◉ What describes the f-number?
Answer: Focal length divided by the aperture
The f-number is the ratio of the focal length to the size of the
aperture.
◉ For a non-focused transducer, the region between the transducer
element and the point at which the sound beam is narrowest is
called the:
Answer: Near zone length or fresnal zone
FULLY SOLVED QUESTION SET
◉ During production of a sonogram you image blood, bile, soft
tissue, calcification and muscle. Which is the MOST attenuating?
Answer: Calcification
◉ Axial resolution is determined chiefly by?
Answer: Pulse duration
The shorter the pulse duration, the better the axial resolution
◉ The transfer of acoustic energy into heat is termed?
Answer: Absorption
◉ With A-mode, the strength of the echo signal is represented by:
Answer: The height of the spike
◉ What is the main advantage of using an intracavitary probe
compared to a standard transducer?
,Answer: Since the intracavitary probe is closer to the AOI, a higher
frequency transducer can be used, resulting in superior spatial
resolution.
◉ Absorption, scattering and attenuation all increases as
___________increases?
Answer: Frequency
◉ You notice that the image in the far field is less bright compared to
the near field. This is due to:
Answer: Sound attenuation
◉ The dark area (shadowing) underneath gallstones is primarily
due to:
Answer: Increased attenuation
◉ You are performing a sonographic exam with a wide-bandwidth
transducer. The advantage you obtain with this transducer
compared to a narrow-band transducer is:
Answer: Improved axial resolution
◉ Other names for axial resolution:
Answer: LARRD: longitudinal, axial, range, radial, and depth
, ◉ Dynamic receive focusing uses:
Answer: Time delays before echo signals from array elements are
combined
With dynamic receive focusing, the echoes that are received first are
held in delay circuitry until all of the
echoes from the same depth have been received. This results in
constructive interference of the waves and produces a higher
amplitude
and more focused signal.
◉ What describes the f-number?
Answer: Focal length divided by the aperture
The f-number is the ratio of the focal length to the size of the
aperture.
◉ For a non-focused transducer, the region between the transducer
element and the point at which the sound beam is narrowest is
called the:
Answer: Near zone length or fresnal zone
