SPI Review Questions – Davies EXAM
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WITH ANSWERS |\
Will not cause a redirection of part of the ultrasound energy -
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CORRECT ANSWERS ✔✔absorption |\ |\
You are scanning a large mass composed primarily of fat. What
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will you most likely encounter? - CORRECT ANSWERS ✔✔axial
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misregistration of object distal to the mass on the screen due to |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the slower propagation speed through fat
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What 2 conditions must be present to cause a refraction in
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soundwave? - CORRECT ANSWERS ✔✔oblique incidence and |\ |\ |\ |\ |\ |\
change in propagation speed |\ |\ |\
What may be detected with refraction? - CORRECT ANSWERS
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✔✔lateral misregistration |\
Of the following structures, which is the most attenuating: blood,
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bile, lung tissue, calcification? - CORRECT ANSWERS
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✔✔calcifications - leaves a shadow |\ |\ |\ |\
What can you do to enhance the visibility of specular reflectors? -
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CORRECT ANSWERS ✔✔perpendicular incidence
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, What tissue/sound interaction is primarily responsible for imaging
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internal structures of organs? - CORRECT ANSWERS ✔✔scattering
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What tissue/sound interaction is necessary for an ultrasound
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image? - CORRECT ANSWERS ✔✔reflection
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For soft tissues, what is needed for determining what a specific
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impedance is? - CORRECT ANSWERS ✔✔bulk modulus and
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interface
You are imaging a structure that is highly attenuating. What
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imaging artifact would you expect to encounter? - CORRECT
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ANSWERS ✔✔shadowing |\
Does sound travel slower through air or through soft tissue? -
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CORRECT ANSWERS ✔✔air |\ |\
An increase in transmit power changes what? - CORRECT
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ANSWERS ✔✔acoustic power |\ |\
What would you change if image does not show adequate
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penetration in far field and shows noise instead of tissue? -
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CORRECT ANSWERS ✔✔decrease the transmit frequency because
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lower frequency penetrates better
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What is the range of frequencies for human hearing? - CORRECT
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ANSWERS ✔✔20Hz - 20,000Hz |\ |\ |\
|\ |\ |\ |\ |\ |\
WITH ANSWERS |\
Will not cause a redirection of part of the ultrasound energy -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔absorption |\ |\
You are scanning a large mass composed primarily of fat. What
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
will you most likely encounter? - CORRECT ANSWERS ✔✔axial
|\ |\ |\ |\ |\ |\ |\ |\ |\
misregistration of object distal to the mass on the screen due to |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the slower propagation speed through fat
|\ |\ |\ |\ |\
What 2 conditions must be present to cause a refraction in
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
soundwave? - CORRECT ANSWERS ✔✔oblique incidence and |\ |\ |\ |\ |\ |\
change in propagation speed |\ |\ |\
What may be detected with refraction? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔lateral misregistration |\
Of the following structures, which is the most attenuating: blood,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
bile, lung tissue, calcification? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔calcifications - leaves a shadow |\ |\ |\ |\
What can you do to enhance the visibility of specular reflectors? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔perpendicular incidence
|\ |\ |\ |\
, What tissue/sound interaction is primarily responsible for imaging
|\ |\ |\ |\ |\ |\ |\
internal structures of organs? - CORRECT ANSWERS ✔✔scattering
|\ |\ |\ |\ |\ |\ |\ |\
What tissue/sound interaction is necessary for an ultrasound
|\ |\ |\ |\ |\ |\ |\ |\
image? - CORRECT ANSWERS ✔✔reflection
|\ |\ |\ |\
For soft tissues, what is needed for determining what a specific
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
impedance is? - CORRECT ANSWERS ✔✔bulk modulus and
|\ |\ |\ |\ |\ |\ |\ |\
interface
You are imaging a structure that is highly attenuating. What
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
imaging artifact would you expect to encounter? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔shadowing |\
Does sound travel slower through air or through soft tissue? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔air |\ |\
An increase in transmit power changes what? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔acoustic power |\ |\
What would you change if image does not show adequate
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
penetration in far field and shows noise instead of tissue? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔decrease the transmit frequency because
|\ |\ |\ |\ |\ |\
lower frequency penetrates better
|\ |\ |\ |\
What is the range of frequencies for human hearing? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔20Hz - 20,000Hz |\ |\ |\
