Davies Ultrasound transducers EXAM LATEST VERSION WITH ANSWERS

Davies Ultrasound transducers EXAM |\ |\ |\ |\




LATEST VERSION WITH ANSWERS |\ |\ |\




You are using a 5 MHz, 40 mm linear array transducer to image a
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structure. What is the width of the image?
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A. 20 mm
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B. 40 mm
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C. 80 mm
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D. 120 mm - CORRECT ANSWERS ✔✔B. 40 mm
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You have selected a wide bandwidth transducer with multiple
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transmit frequencies to perform a sonographic examination.
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Which transmitted frequencies did you select for maximum
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penetration
A. 3.0 MHz
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B. 3.5 MHz
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C. 4.0 MHz
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D. 5.0 MHz
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E. Penetration is not affected by frequency - CORRECT ANSWERS
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✔✔A. 3.0 MHz |\ |\




Which probe would have the best axial resolution to measure the
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thickness of a small structure?
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A. 5 MHz linear array
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B. 7 MHz linear array
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,C. 10 MHz linear array
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D. 5 MHz curved array
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E. 5 MHz phased array - CORRECT ANSWERS ✔✔C. 10 MHz linear
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array
Axel resolution improves with increasing frequency
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You are performing a sonographic exam with a wide band with
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the transducer. The advantage you obtain with this transducer
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compared to narrowband with transducer is |\ |\ |\ |\ |\




A. Decreased acoustic power output
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B. Improved axial resolution
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C. Improved Lateral resolution
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D. Improve focusing
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E. Wide band with transducers can be auto clave - CORRECT
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ANSWERS ✔✔B. Improved axial resolution |\ |\ |\ |\




Axial resolution is improved with wide band with transducers
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Which transducer would provide the longest near zone length
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A. 10 MHz, 6 mm diameter aperture
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B. 10 MHz, 5 mm diameter aperture
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C. 10 MHz, 4 mm diameter aperture
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D. 10 MHz, 3 mm diameter aperture
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E. 10 MHz 2mm diameter aperture - CORRECT ANSWERS ✔✔A.
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10 MHz, 6 mm diameter aperture
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,The near zone length increases with increasing aperture. The
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aperture is the size of the source of the sound
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The location where the sound beam reaches its narrows diameter
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is known as the
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A. Fraunhofer zone
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B. Beam area
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C. Fresnel zone
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D. Currie point
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E. Focal zone - CORRECT ANSWERS ✔✔E. Focal zone
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Which of the following transducers creates a rectangular image
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shape
A. Linear array
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B. Phased array
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C. Annular array
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D. Curved array
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E. B and c only - CORRECT ANSWERS ✔✔A. Linear array
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The term for a transducer that has an array of rectangular
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elements arranged in a straight line is
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A. Annular array
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B. Linear array
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C. Curved array
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D. Oscillating mechanical transducer
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, E. Convex sequenced array - CORRECT ANSWERS ✔✔B. Linear
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array


For a linear array transducer consisting of a single row of
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elements, what method is most used to focus the beam in the
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elevational direction |\




A. Transmit focus
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B. Dynamic receive focusing
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C. Aperture focusing
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D. Mechanical focusing
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E. None of the above - CORRECT ANSWERS ✔✔D. Mechanical
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focusing |\




The Z axis is also known as the out of plain dimension. It is the
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axis that runs across the width of the transducer transmit,
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dynamic receive an aperture focusing require the use of multiple
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elements. Since there are not multiple elements along the width
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of the transducer, these types of focusing cannot be
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accomplished in this Dimensions. Focusing on the Z axis is |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


accomplished by mechanical means either a lens or curvature of |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


the element
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What type of transducer could you choose to produce a beam
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that is symmetrical about the beams axis
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A. Annular Array
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B. Linear sequenced array
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C. Phased array
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D. Curved array
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