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SPI Review Questions - Davies With 100% Verified Answers | Guaranteed Success 2024
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SPI Review Questions - Davies With 100% Verified Answers | Guaranteed Success 2024
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SPI Review Questions - Davies With100% Verified Answers | Guaranteed
Success 2024
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
Maximum cyclical change in quantity is known as? CORRECT ANSWERS amplitude
Bulk modulus is closely related to? CORRECT ANSWERS stiffness
Time it takes for one ? CORRECT ANSWERS period
If number of cycles in a pulse is increased but wavelength remains the same, what changes? CORRECT ANSWERS pulse duration
Which transducer would you use for a large patient that would have the least amount of signal attenuation? CORRECT ANSWERS lower frequency - goes deeper
Speed of ultrasound in bone? CORRECT ANSWERS 4080 m/s
Speed of sound is defined as? CORRECT ANSWERS speed at which sound propagates through a medium
Longitudinal wave is characterized by? CORRECT ANSWERS it travels in one direction
What regions of a wave show decreased particle density in a medium? CORRECT ANSWERS rarefaction
Terms used to describe the strength of a sound beam? CORRECT ANSWERS amplitude, intensity
Ultrasound propagation velocity depends on? CORRECT ANSWERS density and compressibility (stiffness)
The frequency of the transmission signal is determined by? CORRECT ANSWERS the frequency of the electric signal applied to the transducer
When you adjust PRF, you are changing what? CORRECT ANSWERS the number of pulses per second
Time it takes for one pulse to occur is known as? CORRECT ANSWERS pulse duration
Length it takes for one cycle to occur? CORRECT ANSWERS wavelength
Bandwidth refers to what? CORRECT ANSWERS range of frequencies
What kind of amplitude does "in phase" give? CORRECT ANSWERS increased
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