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SPI Mock Registry Exam C20 Questions & Answers 2023/2024
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SPI Mock Registry Exam C20 Questions & Answers 2023/2024 As frequency increase, the amount of scatter - ANSWER-increases Which physics principle describes the decrease in pressure at a stenosis due to increased velocity at the site? - ANSWER-Bernoulli Prinicple ______ occurs posterior to h...

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  • August 9, 2023
  • 5
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • spi mock registry exam c20

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  • SPI Mock Registry
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SPI Mock Registry Exam C20 Questions
& Answers 2023/2024
As frequency increase, the amount of scatter - ANSWER-increases



Which physics principle describes the decrease in pressure at a stenosis due to increased velocity at the
site? - ANSWER-Bernoulli Prinicple



______ occurs posterior to highly attenuating structures - ANSWER-shadowing



Constructive and destructive interference are demonstrated on the image as what acoustic artifact? -
ANSWER-speckle



What part of the ultrasound system is responsible for changing the PRF with changes in image depth? -
ANSWER-pulser



Which type of phantom is necessary to evaluate temporal resolution? - ANSWER-Fluid-filled doppler
phantom



Which system component improves lateral resolution? - ANSWER-pulser



If the frequency of the beam increases, the propagation speed in the media will _____________ -
ANSWER-not change



Which of the following correctly describes a limitation of the fast fourier transformer - ANSWER-requires
a minimum of two samples per cycle to process and produce a doppler tracing



An advantage of virtual beam forming over traditional pulse-echo instrumentation is: - ANSWER-no
transmit focusing is needed

, Some US transducer arrays allow you to reduce the thickness of the beam, as an additional type of
focusing. What effect will this change have on the image? - ANSWER-improved elevational resolution



All of the following are appropriate reasons to perform a contrast enhanced ultrasound exam, except? -
ANSWER-improve the visualization fo bowel segments



Range equations: distance to reflector = - ANSWER-propagation speed X 1/2 (time to and from reflector)



If you are performing an abdominal exam, but inadvertently select the carotid preset on the machine,
how will this affect you exam? - ANSWER-Depth settings will be very superficial



Cardiac strain imaging is used to evaluate the function of the: - ANSWER-myocardium



What US system function converts the returned waves into all positive voltages (compressions)? -
ANSWER-rectification



The ultrasound image is usually created using all of the reflected frequencies in a pulse. When using
___________ the reflected frequencies are divided into smaller sections and each of the sections is used
to create an image. - ANSWER-frequency compounding



As the element diameter decreases, the focal length________ - ANSWER-will decrease



When using virtual beam forming the ultrasound beam is described as: - ANSWER-laser-thin



Resistive index is a ratio utilized to quantify which of the following? - ANSWER-resistance to flow



While scanning soft tissue, the reflected wave returned to the transducer in 0.05msec. How far away is
the reflector. - ANSWER-4cm



Which of the following is a function of the signal processor? - ANSWER-filtering and compression

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