Doppler Effect Edelman (303-324)

The doppler shift is also called __

__ between the sound source and the receiver creates a frequency change

The __ is a low frequency that rides on top of the much higher frequency transducer

__ = reflected frequency - transmitted frequency

When are doppler shifts created?

• When transmitted sound waves strike moving RBC's

• When transmitted sound waves strike stationary RBC's

• When transmitted sounds waves strike BBCs

When blood cells move towards the transducer the doppler shift is ___

• Positive

• Negative

When the blood cells move away from the transducer the doppler shift is __

• Positive

• Negative

Do doppler frequencies indicate SPEED or VELOCITY?

• Velocity

• Speed

Doppler shift = ____

• 2 x velocity of blood x transducer frequency x cos all divided by prop speed

• Transducer frequency - relative frequency

• 2 x velocity of blood x transducer frequency x sin all divided by prop speed

What is the relationship between the velocity of blood and the doppler shift?

• Inverse

• Direct

• Related

• Unrelated