Ultrasound Physics: Interaction With Soft Human Tissue

10 Questions | By Mannixgwafu | Updated: Oct 31, 2022 | Attempts: 624

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Ultrasound Physics: Interaction With Soft Human Tissue - Quiz

Are you ready for the ultrasound physics quiz? Here is the ultimate ultrasound Physics and Instrumentation Examination for you. Ultrasound is known as sound waves that have frequencies higher than the upper audible limit a human can hear. Here are some interesting and important questions to see if you really understand ultrasound physics well enough or not. We hope you score high and do your best on this quiz. All the best.

Questions and Answers

1.

Attenuation rate in the human body (roundtrip)
- A.
  
  1 dB/cm/MHz
- B.
  
  0.5 dB/cm/MHz
- C.
  
  1. dB/cm/Hz
- D.
  
  0.5 dB/cm/Hz
2.

Which of the following will happen if the ultrasound wave travels through the medium at 90 degrees perpendicular to the object?
- A.
  
  The reflected wave will be returned to the sound source in a different path.
- B.
  
  More ultrasound echoes will be picked up by the receiver
- C.
  
  Both will happen
- D.
  
  None of them will happen
3.

It is the sound beam that comes from structures that throw back the sound beam they have intercepted.
- A.
  
  Reflected beam
- B.
  
  Resonating beam
- C.
  
  Echo
- D.
  
  All of the above
- E.
  
  None of the above
4.

Red Blood Cells are the major specular reflectors in the human body.
- A.
  
  True
- B.
  
  False
5.

which of the following statements describes reflection? I.the amount of reflected energy depends on the difference in the acoustic impedance of the two media through which ultrasound passes.II.it is the bending of a wave when it passes through a medium with different densities.III. bouncing back of the wave as it interacts with structures along its path.
- A.
  
  I and II
- B.
  
  I and III
- C.
  
  II and III
- D.
  
  All of the above
- E.
  
  None of the above
6.

A reflector that is small compared to the wavelength of the transmitted frequency will produce,
- A.
  
  Multiple artifacts
- B.
  
  Snell's scattering
- C.
  
  Huygen's principle
- D.
  
  Rayleigh scattering
7.

Reflection at the tissue interface depends primarily on
- A.
  
  Impedance
- B.
  
  Bandwidth
- C.
  
  Beam profile
- D.
  
  Velocity difference
8.

Velocity times density equals
- A.
  
  Impedance
- B.
  
  Intensity
- C.
  
  Duty factor
- D.
  
  Mass
9.

The degree of attenuation is dependent on
- A.
  
  Frequency and propagation speed
- B.
  
  Distance and angle of incidence
- C.
  
  Wavelength and amplitude
- D.
  
  Frequency and distance
10.

What is scattering?
- A.
  
  Bending of sound beam in any direction
- B.
  
  Redirection of sound beam in many directions
- C.
  
  Conversion of sound energy to heat energy
- D.
  
  None of the above