Ultrasound Physics Quiz Instrumentation, Doppler

What is the receiver function that adjusts the image because of the darker appearance of reflectors in the far field as a result of attenuation?

• Compression

• Compensation

• Confirmation

• Condensation

Tags

NGSS.HS-PS4-5

Which of the following tasks is incorporated in the process of demodulation?

• Rejection

• Rectification

• Amplification

Tags

NGSS.HS-PS4-5

The signal processing technique to remove the negative components of the echo-induced signal is __________________?

• rectification
• looping

• smoothing

• integration

The output gain of the pulser determines the ________ of the acoustic pulse.

• Frequency

• Intensity

• Duration

• Pulse repetition period

• Receiving

Tags

NGSS.HS-PS4-5

Which condition(s) is (are) consistent with laminar flow?

• Blood flow in concentric layers with little mixing between layers

• Peak velocity is greater than 1 m/s

• Peak velocity occurs near the vessel wall

• All of the above

What method determines the location of a reflector by measuring the elapsed time between transmitted pulsed ultrasound wave and the detected echo from the interface?

• Apodization

• Autocorrelation

• Echo ranging

• Pulse inversion

Tags

NGSS.HS-PS4-5

Doppler ultrasound measures the velocity of blood flow with all the following factors except _____________________.

• acoustic velocity

• angle of incidence

• Doppler shift frequency

• Reflection coefficient

• Transducer frequency

What term describes the range of amplitudes that can be processed or represented by the ultrasound machine?

• Analog-to-digital conversion

• Demodulation

• Dynamic range

• High pass filter

With 6 bits, what is the largest number of different shades of gray that can be stored?

• 64

• 8

• 256

• 16

In B-mode imaging, the stronger the return echo,

• The darker the dot on the display

• The brighter the dot on the display

• The worse the temporal resolution

• The weaker the transmit power

Tags

NGSS.HS-PS4-5