Davies SPI Review (Latest 2025/2026 Update) Questions with Verified Answers |100% Correct.

Davies SPI Review (Latest 2025/2026 Update)
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Questions with Verified Answers |100% Correct. i,- i,- i,- i,- i,-




What tissue/sound interaction is primarily responsible for
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imaging internal structures of organs?
i,- scattering i,- i,- i,- i,-i,- i,-




What tissue/sound interaction is necessary for an ultrasound
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image? reflection
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For soft tissues, what is needed for determining what a specific
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impedance is? bulk modulus and interface
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You are imaging a structure that is highly attenuating. What
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imaging artifact would you expect to encounter?
i,- shadowing
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Does sound travel slower through air or through soft tissue?
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air


An increase in transmit power changes what?
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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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,decrease the transmit frequency because lower frequency
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penetrates better i,-




What is the range of frequencies for human hearing?
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20,000Hz


Maximum cyclical change in quantity is known as?
i,- i,- i,- i,- i,- i,- i,- i,-i,- i,- amplitude


Will not cause a redirection of part of the ultrasound energy
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absorption


You are scanning a large mass composed primarily of fat. What
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will you most likely encounter?
i,- i,- axial misregistration of object
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distal to the mass on the screen due to the slower propagation
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speed through fati,- i,-




What 2 conditions must be present to cause a refraction in
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soundwave? oblique incidence and i,-i,- i,- i,- i,-




change in propagation speed
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What may be detected with refraction?
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i,-

, Of the following structures, which is the most attenuating: blood,
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bile, lung tissue, calcification?
i,- calcifications - leaves a shadow
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What can you do to enhance the visibility of specular reflectors?
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perpendicular incidence
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Bulk modulus is closely related to?
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Time it takes for one ? i,- i,- i,- i,- i,- i,-i,- i,- period


If number of cycles in a pulse is increased but wavelength
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remains the same, what changes? pulse duration
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Which transducer would you use for a large patient that would
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have the least amount of signal attenuation?
i,- lower frequency
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- goes deeper
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Speed of ultrasound in bone? i,- i,- i,- i,- i,-i,- i,- 4080 m/s i,-




Speed of sound is defined as? i,- i,- i,- i,- i,- i,-i,- i,- speed at which sound i,- i,- i,- i,-



propagates through a medium i,- i,- i,-