2
SPI Review Questions – Davies with precise detailed answers
|| || || || || || || ||
Will not cause a redirection of part of the ultrasound energy - ✔✔absorption
|| || || || || || || || || || || ||
You are scanning a large mass composed primarily of fat. What will you most likely
|| || || || || || || || || || || || || || ||
encounter? - ✔✔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? - ✔✔oblique
|| || || || || || || || || || || || || ||
incidence and ||
change in propagation speed || || ||
What may be detected with refraction? - ✔✔lateral misregistration
|| || || || || || || ||
Of the following structures, which is the most attenuating: blood, bile, lung tissue,
|| || || || || || || || || || || || ||
calcification? - ✔✔calcifications - leaves a shadow || || || || || ||
What can you do to enhance the visibility of specular reflectors? - ✔✔perpendicular
|| || || || || || || || || || || || ||
incidence
What tissue/sound interaction is primarily responsible for imaging internal structures of
|| || || || || || || || || || ||
organs? - ✔✔scattering || ||
What tissue/sound interaction is necessary for an ultrasound image? - ✔✔reflection
|| || || || || || || || || ||
For soft tissues, what is needed for determining what a specific impedance is? - ✔✔bulk
|| || || || || || || || || || || || || || ||
modulus and interface || ||
, 2
You are imaging a structure that is highly attenuating. What imaging artifact would you
|| || || || || || || || || || || || || ||
expect to encounter? - ✔✔shadowing || || || ||
Does sound travel slower through air or through soft tissue? - ✔✔air
|| || || || || || || || || || ||
An increase in transmit power changes what? - ✔✔acoustic power
|| || || || || || || || ||
What would you change if image does not show adequate penetration in far field and shows
|| || || || || || || || || || || || || || ||
noise instead of tissue? - ✔✔decrease the transmit frequency because lower frequency
|| || || || || || || || || || || || ||
penetrates better ||
What is the range of frequencies for human hearing? - ✔✔20Hz - 20,000Hz
|| || || || || || || || || || || ||
Maximum cyclical change in quantity is known as? - ✔✔amplitude || || || || || || || || ||
Bulk modulus is closely related to? - ✔✔stiffness
|| || || || || || ||
Time it takes for one ? - ✔✔period
|| || || || || || ||
If number of cycles in a pulse is increased but wavelength remains the same, what changes?
|| || || || || || || || || || || || || || ||
- ✔✔pulse duration
|| || ||
Which transducer would you use for a large patient that would have the least amount of
|| || || || || || || || || || || || || || || ||
signal attenuation? - ✔✔lower frequency - goes deeper
|| || || || || || ||
Speed of ultrasound in bone? - ✔✔4080 m/s
|| || || || || || ||
SPI Review Questions – Davies with precise detailed answers
|| || || || || || || ||
Will not cause a redirection of part of the ultrasound energy - ✔✔absorption
|| || || || || || || || || || || ||
You are scanning a large mass composed primarily of fat. What will you most likely
|| || || || || || || || || || || || || || ||
encounter? - ✔✔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? - ✔✔oblique
|| || || || || || || || || || || || || ||
incidence and ||
change in propagation speed || || ||
What may be detected with refraction? - ✔✔lateral misregistration
|| || || || || || || ||
Of the following structures, which is the most attenuating: blood, bile, lung tissue,
|| || || || || || || || || || || || ||
calcification? - ✔✔calcifications - leaves a shadow || || || || || ||
What can you do to enhance the visibility of specular reflectors? - ✔✔perpendicular
|| || || || || || || || || || || || ||
incidence
What tissue/sound interaction is primarily responsible for imaging internal structures of
|| || || || || || || || || || ||
organs? - ✔✔scattering || ||
What tissue/sound interaction is necessary for an ultrasound image? - ✔✔reflection
|| || || || || || || || || ||
For soft tissues, what is needed for determining what a specific impedance is? - ✔✔bulk
|| || || || || || || || || || || || || || ||
modulus and interface || ||
, 2
You are imaging a structure that is highly attenuating. What imaging artifact would you
|| || || || || || || || || || || || || ||
expect to encounter? - ✔✔shadowing || || || ||
Does sound travel slower through air or through soft tissue? - ✔✔air
|| || || || || || || || || || ||
An increase in transmit power changes what? - ✔✔acoustic power
|| || || || || || || || ||
What would you change if image does not show adequate penetration in far field and shows
|| || || || || || || || || || || || || || ||
noise instead of tissue? - ✔✔decrease the transmit frequency because lower frequency
|| || || || || || || || || || || || ||
penetrates better ||
What is the range of frequencies for human hearing? - ✔✔20Hz - 20,000Hz
|| || || || || || || || || || || ||
Maximum cyclical change in quantity is known as? - ✔✔amplitude || || || || || || || || ||
Bulk modulus is closely related to? - ✔✔stiffness
|| || || || || || ||
Time it takes for one ? - ✔✔period
|| || || || || || ||
If number of cycles in a pulse is increased but wavelength remains the same, what changes?
|| || || || || || || || || || || || || || ||
- ✔✔pulse duration
|| || ||
Which transducer would you use for a large patient that would have the least amount of
|| || || || || || || || || || || || || || || ||
signal attenuation? - ✔✔lower frequency - goes deeper
|| || || || || || ||
Speed of ultrasound in bone? - ✔✔4080 m/s
|| || || || || || ||
