Ultrasound Physics Ch. 2 - 6

42 Questions | By Gladys0520 | Last updated: Mar 21, 2022 | Total Attempts: 2845

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An extra help for those of you who are studying for the SPI. It will be based on chapters 2 - 6

Questions and Answers

1.

Sound waves carry energy
- A.
  
  True
- B.
  
  False
2.

Sound waves are longitudinal waves sound travels in a straight line
- A.
  
  True
- B.
  
  False
3.

What are the acousitic variables?
- A.
  
  Pressure, density, distance
- B.
  
  Period, frequency, amplitude, power, intensity, wavelength, propagation speed
4.

What are the acoustic parameters?
- A.
  
  Pressure density distance
- B.
  
  Period frequency amplitude power intensity wavelength propagation speed
5.

A pair of waves are considered out of phase when their peaks occur at the same time and location
- A.
  
  True
- B.
  
  False
6.

Infrasound is?
- A.
- B.
  
  Between 20 Hz & 20 kHz
- C.
  
  >20 kHz
7.

Period and frequency are determined by?
- A.
  
  Sound source
- B.
  
  Sound source and medium
- C.
  
  Medium
8.

Period and frequency are
- A.
  
  Inversely
- B.
  
  Directly
- C.
  
  Proportional
- D.
  
  Reciprocal
9.

Amplitude has which units?
- A.
  
  Acoustic variables
- B.
  
  Watts
- C.
  
  Energy
10.

Amplitude , power, intensity are determined by the
- A.
  
  Medium
- B.
  
  Sound source
- C.
  
  Both sound source and medium
11.

Amplitude, power, intensity are not adjustable
- A.
  
  True
- B.
  
  False
12.

Wavelength is determined by
- A.
  
  Sound source
- B.
  
  Medium
- C.
  
  Both
13.

As frequency increases, wavelength decreases
- A.
  
  True
- B.
  
  False
14.

Which type of wavelength sound produces higher quality images with greater detail?
- A.
  
  Short
- B.
  
  Long
- C.
  
  Either one
15.

Propagation speed is determined by
- A.
  
  Sound source
- B.
  
  Medium
- C.
  
  Both
16.

What is the speed in liver?
- A.
  
  1540 m/s
- B.
  
  1450 m/s
- C.
  
  1560 m/s
- D.
  
  3500 m/s
17.

If the power of a wave is tripled the intensity is reduced to one third
- A.
  
  True
- B.
  
  False
18.

The effects of sound waves on tissue in the body are called?
- A.
  
  Acoustic propagation properties
- B.
  
  Bioeffects
19.

The start of a pulse to the end of that pulse is reffering to ....
- A.
  
  Spatial pulse length
- B.
  
  Pulse repition period
- C.
  
  Pulse repition frequency
- D.
  
  Dulse duration
20.

What is pulse duration's formula?
- A.
  
  # of cycles x wavelength / frequency
- B.
  
  Has no formula
- C.
  
  # of cycles x wavelength
- D.
  
  # of cycles / frequency
21.

Pulse duration is directly related to the frequency
- A.
  
  True
- B.
  
  False
22.

What is spatial pulse length definition?
- A.
  
  Distance that a pulse occupies in space from start to the end of a pulse
- B.
  
  Time that a pulse occupies in space from start to the end of a pulse
- C.
  
  Time from the start of a pulse to the start of the next pulse
- D.
  
  The number of pulses that an ultrasound system transmits into the body each second
23.

Is pulse repition period (PRP) adjustable?
- A.
  
  Yes
- B.
  
  No
24.

Depth of view describes the minimum distance into the body that an ultrasound system is imaging
- A.
  
  True
- B.
  
  False
25.

How are PRP and depth related?
- A.
  
  Directly
- B.
  
  Inversly
- C.
  
  No relationship