#1
What does Doppler ultrasound measure?
Blood flow velocity
ExplanationAssesses the velocity of blood flow in vessels using ultrasound.
#2
Which type of ultrasound Doppler imaging is used to measure blood flow direction?
Color Doppler
ExplanationUtilizes color mapping to indicate the direction of blood flow in vessels.
#3
In Doppler ultrasound, what does the Doppler effect refer to?
Change in frequency of sound waves reflected from moving objects
ExplanationDescribes the frequency shift in sound waves caused by moving objects, detected in ultrasound imaging.
#4
What is the principle behind color Doppler ultrasound?
It measures the frequency shift of sound waves reflected from moving objects
ExplanationUtilizes frequency shift analysis to visualize blood flow direction and velocity in color-coded images.
#5
Which parameter does Power Doppler ultrasound primarily assess?
Blood flow intensity
ExplanationFocuses on evaluating the intensity or strength of blood flow in vessels using ultrasound.
#6
What is a key advantage of using Doppler ultrasound in obstetrics?
It allows for real-time assessment of fetal heart rate
ExplanationEnables real-time monitoring of fetal heart rate, a crucial aspect in obstetric care.
#7
What is the aliasing phenomenon in Doppler ultrasound?
Generation of spurious signals due to high flow velocities
ExplanationCreation of false signals in Doppler imaging when flow velocities exceed the Nyquist limit.
#8
How does the angle between the ultrasound beam and blood flow affect Doppler measurements?
It affects the accuracy of velocity measurements
ExplanationThe angle influences the precision of velocity measurements in Doppler ultrasound.
#9
What does the Nyquist limit represent in Doppler ultrasound?
Maximum detectable velocity
ExplanationDefines the upper limit of velocity that can be accurately measured in Doppler ultrasound.
#10
What is the Doppler shift equation used to calculate?
Change in frequency of sound waves due to motion
ExplanationMathematical formula to quantify the frequency change of ultrasound waves caused by motion in Doppler ultrasound.
#11
In Doppler ultrasound, what does the Doppler angle represent?
Angle between the transducer and the direction of blood flow
ExplanationDenotes the angle formed between the ultrasound transducer and the direction of blood flow in Doppler imaging.