Doppler Ultrasound Quiz 1.1 (110)

Which type of Doppler is displayed on a time-velocity graph?

• Color flow Doppler (CFD)

• Spectral Doppler

• M-Mode Doppler

• 2D Doppler

What is the ideal Doppler angle to blood flow?

• 0 or 180 degrees

• 45 or 90 degrees

• 30 or 60 degrees

• 15 or 75 degrees

What does CFD stand for in the context of Diagnostic Medical Sonography-Echocardiography?

• Color Flow Doppler

• Continuous Flow Doppler

• Color Frequency Doppler

• Continuous Frequency Doppler

What happens when aliasing occurs in Color Flow Doppler (CFD)?

• The colors switch to those on the opposite side

• The colors become darker

• The colors disappear

• The colors become brighter

What color represents laminar flow traveling toward the transducer in the color scale?

• Red

• Yellow

• Blue

• Light Blue

What does the color yellow indicate in the color scale?

• Increased velocity and/or turbulent flow traveling toward the transducer

• Laminar flow traveling toward the transducer

• Laminar flow traveling away from the transducer

• Increased velocity and/or turbulent flow traveling away from the transducer

When does color aliasing occur?

• When the peak velocity is greater than the Nyquist Limit

• When the peak velocity is less than the Nyquist Limit

• When the peak velocity is equal to the Nyquist Limit

• When there is no peak velocity

What does color aliasing indicate on the velocity map?

• Higher velocities

• Lower velocities

• Constant velocities

• No velocities

What is the term for abnormal, backward flow through a closed valve?

• Stenosis

• Shunt

• Regurgitation

• Normal flow

What is another name for a "defective" valve?

• Normal valve

• Insufficient valve

• Stenotic valve

• Shunt valve