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