Davies Ultrasound transducers Exam
2026 Questions and Answers
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 - Correct answer-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
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,E. Penetration is not affected by frequency - Correct answer-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 - Correct answer-C. 10 MHz linear array
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
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,E. Wide band with transducers can be auto clave - Correct answer-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 - Correct answer-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
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, C. Fresnel zone
D. Currie point
E. Focal zone - Correct answer-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 - Correct answer-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 - Correct answer-B. Linear array
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2026 Questions and Answers
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 - Correct answer-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
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,E. Penetration is not affected by frequency - Correct answer-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 - Correct answer-C. 10 MHz linear array
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
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,E. Wide band with transducers can be auto clave - Correct answer-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 - Correct answer-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
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, C. Fresnel zone
D. Currie point
E. Focal zone - Correct answer-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 - Correct answer-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 - Correct answer-B. Linear array
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