Page 1 of 84
DAVIES ULTRASOUND PHYSICS EXAM 2 LATEST UPDATE
WITH 350 QUESTIONS AND CORRECT DETAILED
SOLUTIONS JUST RELEASED THIS YEAR
Question: The unit applied to the Q factor (quality factor) that describes the ratio of operating
frequency to bandwidth is called
a. Megahertz (MHz)
b. Percent
c. Millimeters per microsecond
d. Fresnel
e. None of the above - CORRECT ANSWER✔✔e. none of the above
Question: The backing material that is usually constructed in a continuous wave Doppler
transducer is
a. Epoxy resin
b. Cork
c. Air
d. Tungsten powder
e. None of the above - CORRECT ANSWER✔✔e. None of the above
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SUCCESS!
,Page 2 of 84
Question: The intensity of the ultrasound beam
a. Is measured in watts
b. Is always constant
c. Depends on beam diameter
d. Is measured with the AIUM phantom - CORRECT ANSWER✔✔c. Depends on beam diameter
Question: Whose principle states: "All points on an ultrasound waveform can be considered as
point sources for the production of secondary spherical wavelets"?
a. Doppler's
b. Curie's
c. Huygens'
d. Transmission coefficient - CORRECT ANSWER✔✔c. Huygens'
Question:The ability to resolve structures lying perpendicular to the axis of the ultrasound beam
is called
a. Lateral resolution
b. Axial resolution
c. Depth resolution
d. Longitudinal resolution - CORRECT ANSWER✔✔a. Lateral resolution
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,Page 3 of 84
Question: Generally, ultrasound transducer have
a. Better axial resolution than lateral resolution
b. Better lateral resolution than axial resolution
c. Better azimuthal resolution than radial resolution
d. Equal axial and lateral resolution - CORRECT ANSWER✔✔a. Better axial resolution than lateral
resolution
Question: Which of the following are most commonly used in ultrasound transducers
a. Lead zirconate titanate (PZT)
b. Barium sulfate
c. Metaniobate
d. Quartz - CORRECT ANSWER✔✔a. Lead zirconate titanate (PZT)
Question: Which of the following varies with distance from the transducer?
a. Lateral resolution
b. Frequency
c. Axial resolution
d. Special pulse length - CORRECT ANSWER✔✔a. Lateral resolution
3
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, Page 4 of 84
Question: Increasing axial resolution by increasing frequency results in
a. Increasing penetration
b. Decreasing half-intensity depth
c. Decreasing the pulse repetition frequency
d. None of the above - CORRECT ANSWER✔✔b. Decreasing half-intensity depth
Question: Transducers are focused by two major methods: internal focusing and external
focusing. These methods can be accomplished by
a. Thickening the crystal and adding a water path
b. Cutting a curved transducer element and/or using an acoustic lens
c. Draping the crystal with metal ions and damping
d. Using a crystal pulse and a bandwidth limiter
e. All of the above will focus a transducer element - CORRECT ANSWER✔✔b. Cutting a curved
transducer element and/or using an acoustic lens
Question: Near zone length may be increased by increasing
a. Wavelength
b. Wavelength and bandwidth
c. Transducer diameter
4
SUCCESS!
DAVIES ULTRASOUND PHYSICS EXAM 2 LATEST UPDATE
WITH 350 QUESTIONS AND CORRECT DETAILED
SOLUTIONS JUST RELEASED THIS YEAR
Question: The unit applied to the Q factor (quality factor) that describes the ratio of operating
frequency to bandwidth is called
a. Megahertz (MHz)
b. Percent
c. Millimeters per microsecond
d. Fresnel
e. None of the above - CORRECT ANSWER✔✔e. none of the above
Question: The backing material that is usually constructed in a continuous wave Doppler
transducer is
a. Epoxy resin
b. Cork
c. Air
d. Tungsten powder
e. None of the above - CORRECT ANSWER✔✔e. None of the above
1
SUCCESS!
,Page 2 of 84
Question: The intensity of the ultrasound beam
a. Is measured in watts
b. Is always constant
c. Depends on beam diameter
d. Is measured with the AIUM phantom - CORRECT ANSWER✔✔c. Depends on beam diameter
Question: Whose principle states: "All points on an ultrasound waveform can be considered as
point sources for the production of secondary spherical wavelets"?
a. Doppler's
b. Curie's
c. Huygens'
d. Transmission coefficient - CORRECT ANSWER✔✔c. Huygens'
Question:The ability to resolve structures lying perpendicular to the axis of the ultrasound beam
is called
a. Lateral resolution
b. Axial resolution
c. Depth resolution
d. Longitudinal resolution - CORRECT ANSWER✔✔a. Lateral resolution
2
SUCCESS!
,Page 3 of 84
Question: Generally, ultrasound transducer have
a. Better axial resolution than lateral resolution
b. Better lateral resolution than axial resolution
c. Better azimuthal resolution than radial resolution
d. Equal axial and lateral resolution - CORRECT ANSWER✔✔a. Better axial resolution than lateral
resolution
Question: Which of the following are most commonly used in ultrasound transducers
a. Lead zirconate titanate (PZT)
b. Barium sulfate
c. Metaniobate
d. Quartz - CORRECT ANSWER✔✔a. Lead zirconate titanate (PZT)
Question: Which of the following varies with distance from the transducer?
a. Lateral resolution
b. Frequency
c. Axial resolution
d. Special pulse length - CORRECT ANSWER✔✔a. Lateral resolution
3
SUCCESS!
, Page 4 of 84
Question: Increasing axial resolution by increasing frequency results in
a. Increasing penetration
b. Decreasing half-intensity depth
c. Decreasing the pulse repetition frequency
d. None of the above - CORRECT ANSWER✔✔b. Decreasing half-intensity depth
Question: Transducers are focused by two major methods: internal focusing and external
focusing. These methods can be accomplished by
a. Thickening the crystal and adding a water path
b. Cutting a curved transducer element and/or using an acoustic lens
c. Draping the crystal with metal ions and damping
d. Using a crystal pulse and a bandwidth limiter
e. All of the above will focus a transducer element - CORRECT ANSWER✔✔b. Cutting a curved
transducer element and/or using an acoustic lens
Question: Near zone length may be increased by increasing
a. Wavelength
b. Wavelength and bandwidth
c. Transducer diameter
4
SUCCESS!
