DAVIES SPI REVIEW ACTUAL SCRIPT 2026
WITH VERIFIED SOLUTIONS
◉ What is a color flash artifact?
Answer: An artifact in ultrasound imaging that appears as a color
signal in areas where there is no true flow, often caused by motion
or tissue harmonics.
◉ What are wall filters?
Answer: Filters used in Doppler ultrasound to eliminate low-
frequency noise and artifacts from the signal, enhancing the
detection of true blood flow.
◉ What techniques are used to demonstrate deep flow in
sonography?
Answer: Techniques such as using lower frequency transducers,
adjusting the Doppler angle, and optimizing gain settings to
visualize blood flow in deeper structures.
◉ What is the purpose of Doppler ultrasound?
, Answer: To measure and visualize blood flow and velocity within
blood vessels by analyzing the frequency shifts of ultrasound waves
reflected from moving red blood cells.
◉ What is aliasing in Doppler ultrasound?
Answer: A phenomenon that occurs when the velocity of blood flow
exceeds the Nyquist limit, causing a misrepresentation of the flow
direction and speed.
◉ What is the Nyquist limit?
Answer: The maximum frequency that can be accurately measured
in Doppler ultrasound, typically calculated as half of the pulse
repetition frequency (PRF).
◉ What is the significance of the Doppler angle?
Answer: The angle between the ultrasound beam and the direction
of blood flow, which affects the accuracy of velocity measurements;
ideally, it should be less than 60 degrees.
◉ What is spectral Doppler?
Answer: A type of Doppler ultrasound that provides a graphical
representation of blood flow velocities over time, allowing for
detailed analysis of hemodynamics.
WITH VERIFIED SOLUTIONS
◉ What is a color flash artifact?
Answer: An artifact in ultrasound imaging that appears as a color
signal in areas where there is no true flow, often caused by motion
or tissue harmonics.
◉ What are wall filters?
Answer: Filters used in Doppler ultrasound to eliminate low-
frequency noise and artifacts from the signal, enhancing the
detection of true blood flow.
◉ What techniques are used to demonstrate deep flow in
sonography?
Answer: Techniques such as using lower frequency transducers,
adjusting the Doppler angle, and optimizing gain settings to
visualize blood flow in deeper structures.
◉ What is the purpose of Doppler ultrasound?
, Answer: To measure and visualize blood flow and velocity within
blood vessels by analyzing the frequency shifts of ultrasound waves
reflected from moving red blood cells.
◉ What is aliasing in Doppler ultrasound?
Answer: A phenomenon that occurs when the velocity of blood flow
exceeds the Nyquist limit, causing a misrepresentation of the flow
direction and speed.
◉ What is the Nyquist limit?
Answer: The maximum frequency that can be accurately measured
in Doppler ultrasound, typically calculated as half of the pulse
repetition frequency (PRF).
◉ What is the significance of the Doppler angle?
Answer: The angle between the ultrasound beam and the direction
of blood flow, which affects the accuracy of velocity measurements;
ideally, it should be less than 60 degrees.
◉ What is spectral Doppler?
Answer: A type of Doppler ultrasound that provides a graphical
representation of blood flow velocities over time, allowing for
detailed analysis of hemodynamics.
