2
Davies Ultrasound transducers Exam with accurate detailed
|| || || || || || ||
solutions
You are using a 5 MHz, 40 mm linear array transducer to image a structure. What is the
|| || || || || || || || || || || || || || || || || ||
width of the image? || || ||
A. 20 mm
|| ||
B. 40 mm
|| ||
C. 80 mm
|| ||
D. 120 mm - ✔✔B. 40 mm
|| || || || || ||
You have selected a wide bandwidth transducer with multiple transmit frequencies to
|| || || || || || || || || || || ||
perform a sonographic examination. Which transmitted frequencies did you select for
|| || || || || || || || || || ||
maximum penetration ||
A. 3.0 MHz
|| ||
B. 3.5 MHz
|| ||
C. 4.0 MHz
|| ||
D. 5.0 MHz
|| ||
E. Penetration is not affected by frequency - ✔✔A. 3.0 MHz
|| || || || || || || || || ||
Which probe would have the best axial resolution to measure the thickness of a small
|| || || || || || || || || || || || || || ||
structure?
A. 5 MHz linear array
|| || || ||
B. 7 MHz linear array
|| || || ||
C. 10 MHz linear array
|| || || ||
D. 5 MHz curved array
|| || || ||
E. 5 MHz phased array - ✔✔C. 10 MHz linear array
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,2
Axel resolution improves with increasing frequency
|| || || || ||
You are performing a sonographic exam with a wide band with the transducer. The
|| || || || || || || || || || || || || ||
advantage you obtain with this transducer compared to narrowband with transducer is
|| || || || || || || || || || ||
A. Decreased acoustic power output
|| || || ||
B. Improved axial resolution
|| || ||
C. Improved Lateral resolution
|| || ||
D. Improve focusing
|| ||
E. Wide band with transducers can be auto clave - ✔✔B. Improved axial resolution
|| || || || || || || || || || || || ||
Axial resolution is improved with wide band with transducers
|| || || || || || || ||
Which transducer would provide the longest near zone length
|| || || || || || || ||
A. 10 MHz, 6 mm diameter aperture
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B. 10 MHz, 5 mm diameter aperture
|| || || || || ||
C. 10 MHz, 4 mm diameter aperture
|| || || || || ||
D. 10 MHz, 3 mm diameter aperture
|| || || || || ||
E. 10 MHz 2mm diameter aperture - ✔✔A.
|| || || || || || ||
10 MHz, 6 mm diameter aperture
|| || || || ||
The near zone length increases with increasing aperture. The aperture is the size of the
|| || || || || || || || || || || || || || ||
source of the sound || || ||
The location where the sound beam reaches its narrows diameter is known as the
|| || || || || || || || || || || || ||
A. Fraunhofer zone
|| ||
B. Beam area
|| ||
C. Fresnel zone
|| ||
,2
D. Currie point
|| || ||
E. Focal zone - ✔✔E. Focal zone
|| || || || || ||
Which of the following transducers creates a rectangular image shape
|| || || || || || || || ||
A. Linear array
|| || ||
B. Phased array
|| ||
C. Annular array
|| ||
D. Curved array
|| ||
E. B and c only - ✔✔A. Linear array
|| || || || || || || ||
The term for a transducer that has an array of rectangular elements arranged in a straight
|| || || || || || || || || || || || || || || ||
line is ||
A. Annular array
|| ||
B. Linear array
|| ||
C. Curved array
|| ||
D. Oscillating mechanical transducer
|| || ||
E. Convex sequenced array - ✔✔B. Linear array
|| || || || || || ||
For a linear array transducer consisting of a single row of elements, what method is most
|| || || || || || || || || || || || || || || ||
used to focus the beam in the elevational direction
|| || || || || || || ||
A. Transmit focus
|| ||
B. Dynamic receive focusing
|| || ||
C. Aperture focusing
|| ||
D. Mechanical focusing
|| ||
E. None of the above - ✔✔D. Mechanical focusing
|| || || || || || || || ||
, 2
The Z axis is also known as the out of plain dimension. It is the axis that runs across the
|| || || || || || || || || || || || || || || || || || || ||
width of the transducer transmit, dynamic receive an aperture focusing require the use of
|| || || || || || || || || || || || || ||
multiple elements. Since there are not multiple elements along the width of the transducer,
|| || || || || || || || || || || || || ||
these types of focusing cannot be accomplished in this Dimensions. Focusing on the Z axis
|| || || || || || || || || || || || || || ||
is accomplished by mechanical means either a lens or curvature of the element
|| || || || || || || || || || || ||
What type of transducer could you choose to produce a beam that is symmetrical about the
|| || || || || || || || || || || || || || || ||
beams axis ||
A. Annular Array
|| ||
B. Linear sequenced array
|| || ||
C. Phased array
|| ||
D. Curved array
|| ||
E. Tightly curved array - ✔✔A. Annular array
|| || || || || || ||
The annual array is a round transition in which the elements are arranged concentricly.
|| || || || || || || || || || || || || ||
This transducer creates a cone shaped beam that is symmetric in all dimensions. Linear
|| || || || || || || || || || || || || ||
phased and carter raise produce beams that are asymmetric. They can have multiple focus
|| || || || || || || || || || || || || ||
zones in the plane along the length of the transducer by electronically focusing the be, but
|| || || || || || || || || || || || || || || ||
can only have one area focus in the plane along the width of the transducer. This is
|| || || || || || || || || || || || || || || || ||
accomplished with a mechanical focus || || || ||
The ultrasound system in your lab has a transducer with a small footprint. This kind of
|| || || || || || || || || || || || || || || ||
transducer has the following disadvantage: || || || || ||
A: It cannot be focused in the elevation direction.
|| || || || || || || || ||
B: The field of view in the far field is only 1/4 the diameter of the transducer.
|| || || || || || || || || || || || || || || || ||
C: The near field lateral resolution is poor.
|| || || || || || || ||
D: The Q value is very high.
|| || || || || || ||
E: Resolution is degraded at large distances. - ✔✔E: Resolution is degraded at large
|| || || || || || || || || || || || || ||
distances.
Davies Ultrasound transducers Exam with accurate detailed
|| || || || || || ||
solutions
You are using a 5 MHz, 40 mm linear array transducer to image a structure. What is the
|| || || || || || || || || || || || || || || || || ||
width of the image? || || ||
A. 20 mm
|| ||
B. 40 mm
|| ||
C. 80 mm
|| ||
D. 120 mm - ✔✔B. 40 mm
|| || || || || ||
You have selected a wide bandwidth transducer with multiple transmit frequencies to
|| || || || || || || || || || || ||
perform a sonographic examination. Which transmitted frequencies did you select for
|| || || || || || || || || || ||
maximum penetration ||
A. 3.0 MHz
|| ||
B. 3.5 MHz
|| ||
C. 4.0 MHz
|| ||
D. 5.0 MHz
|| ||
E. Penetration is not affected by frequency - ✔✔A. 3.0 MHz
|| || || || || || || || || ||
Which probe would have the best axial resolution to measure the thickness of a small
|| || || || || || || || || || || || || || ||
structure?
A. 5 MHz linear array
|| || || ||
B. 7 MHz linear array
|| || || ||
C. 10 MHz linear array
|| || || ||
D. 5 MHz curved array
|| || || ||
E. 5 MHz phased array - ✔✔C. 10 MHz linear array
|| || || || || || || || || ||
,2
Axel resolution improves with increasing frequency
|| || || || ||
You are performing a sonographic exam with a wide band with the transducer. The
|| || || || || || || || || || || || || ||
advantage you obtain with this transducer compared to narrowband with transducer is
|| || || || || || || || || || ||
A. Decreased acoustic power output
|| || || ||
B. Improved axial resolution
|| || ||
C. Improved Lateral resolution
|| || ||
D. Improve focusing
|| ||
E. Wide band with transducers can be auto clave - ✔✔B. Improved axial resolution
|| || || || || || || || || || || || ||
Axial resolution is improved with wide band with transducers
|| || || || || || || ||
Which transducer would provide the longest near zone length
|| || || || || || || ||
A. 10 MHz, 6 mm diameter aperture
|| || || || || ||
B. 10 MHz, 5 mm diameter aperture
|| || || || || ||
C. 10 MHz, 4 mm diameter aperture
|| || || || || ||
D. 10 MHz, 3 mm diameter aperture
|| || || || || ||
E. 10 MHz 2mm diameter aperture - ✔✔A.
|| || || || || || ||
10 MHz, 6 mm diameter aperture
|| || || || ||
The near zone length increases with increasing aperture. The aperture is the size of the
|| || || || || || || || || || || || || || ||
source of the sound || || ||
The location where the sound beam reaches its narrows diameter is known as the
|| || || || || || || || || || || || ||
A. Fraunhofer zone
|| ||
B. Beam area
|| ||
C. Fresnel zone
|| ||
,2
D. Currie point
|| || ||
E. Focal zone - ✔✔E. Focal zone
|| || || || || ||
Which of the following transducers creates a rectangular image shape
|| || || || || || || || ||
A. Linear array
|| || ||
B. Phased array
|| ||
C. Annular array
|| ||
D. Curved array
|| ||
E. B and c only - ✔✔A. Linear array
|| || || || || || || ||
The term for a transducer that has an array of rectangular elements arranged in a straight
|| || || || || || || || || || || || || || || ||
line is ||
A. Annular array
|| ||
B. Linear array
|| ||
C. Curved array
|| ||
D. Oscillating mechanical transducer
|| || ||
E. Convex sequenced array - ✔✔B. Linear array
|| || || || || || ||
For a linear array transducer consisting of a single row of elements, what method is most
|| || || || || || || || || || || || || || || ||
used to focus the beam in the elevational direction
|| || || || || || || ||
A. Transmit focus
|| ||
B. Dynamic receive focusing
|| || ||
C. Aperture focusing
|| ||
D. Mechanical focusing
|| ||
E. None of the above - ✔✔D. Mechanical focusing
|| || || || || || || || ||
, 2
The Z axis is also known as the out of plain dimension. It is the axis that runs across the
|| || || || || || || || || || || || || || || || || || || ||
width of the transducer transmit, dynamic receive an aperture focusing require the use of
|| || || || || || || || || || || || || ||
multiple elements. Since there are not multiple elements along the width of the transducer,
|| || || || || || || || || || || || || ||
these types of focusing cannot be accomplished in this Dimensions. Focusing on the Z axis
|| || || || || || || || || || || || || || ||
is accomplished by mechanical means either a lens or curvature of the element
|| || || || || || || || || || || ||
What type of transducer could you choose to produce a beam that is symmetrical about the
|| || || || || || || || || || || || || || || ||
beams axis ||
A. Annular Array
|| ||
B. Linear sequenced array
|| || ||
C. Phased array
|| ||
D. Curved array
|| ||
E. Tightly curved array - ✔✔A. Annular array
|| || || || || || ||
The annual array is a round transition in which the elements are arranged concentricly.
|| || || || || || || || || || || || || ||
This transducer creates a cone shaped beam that is symmetric in all dimensions. Linear
|| || || || || || || || || || || || || ||
phased and carter raise produce beams that are asymmetric. They can have multiple focus
|| || || || || || || || || || || || || ||
zones in the plane along the length of the transducer by electronically focusing the be, but
|| || || || || || || || || || || || || || || ||
can only have one area focus in the plane along the width of the transducer. This is
|| || || || || || || || || || || || || || || || ||
accomplished with a mechanical focus || || || ||
The ultrasound system in your lab has a transducer with a small footprint. This kind of
|| || || || || || || || || || || || || || || ||
transducer has the following disadvantage: || || || || ||
A: It cannot be focused in the elevation direction.
|| || || || || || || || ||
B: The field of view in the far field is only 1/4 the diameter of the transducer.
|| || || || || || || || || || || || || || || || ||
C: The near field lateral resolution is poor.
|| || || || || || || ||
D: The Q value is very high.
|| || || || || || ||
E: Resolution is degraded at large distances. - ✔✔E: Resolution is degraded at large
|| || || || || || || || || || || || || ||
distances.
