SPI Review Questions – Davies Exam
2026 Questions and Answers
Will not cause a redirection of part of the ultrasound energy - Correct answer-
absorption
You are scanning a large mass composed primarily of fat. What will you most
likely encounter? - Correct answer-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
answer-oblique incidence and
change in propagation speed
What may be detected with refraction? - Correct answer-lateral misregistration
Of the following structures, which is the most attenuating: blood, bile, lung tissue,
calcification? - Correct answer-calcifications - leaves a shadow
What can you do to enhance the visibility of specular reflectors? - Correct answer-
perpendicular incidence
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, What tissue/sound interaction is primarily responsible for imaging internal
structures of organs? - Correct answer-scattering
What tissue/sound interaction is necessary for an ultrasound image? - Correct
answer-reflection
For soft tissues, what is needed for determining what a specific impedance is? -
Correct answer-bulk modulus and interface
You are imaging a structure that is highly attenuating. What imaging artifact would
you expect to encounter? - Correct answer-shadowing
Does sound travel slower through air or through soft tissue? - Correct answer-air
An increase in transmit power changes what? - Correct answer-acoustic power
What would you change if image does not show adequate penetration in far field
and shows noise instead of tissue? - Correct answer-decrease the transmit
frequency because lower frequency penetrates better
What is the range of frequencies for human hearing? - Correct answer-20Hz -
20,000Hz
Maximum cyclical change in quantity is known as? - Correct answer-amplitude
Bulk modulus is closely related to? - Correct answer-stiffness
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
2026 Questions and Answers
Will not cause a redirection of part of the ultrasound energy - Correct answer-
absorption
You are scanning a large mass composed primarily of fat. What will you most
likely encounter? - Correct answer-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
answer-oblique incidence and
change in propagation speed
What may be detected with refraction? - Correct answer-lateral misregistration
Of the following structures, which is the most attenuating: blood, bile, lung tissue,
calcification? - Correct answer-calcifications - leaves a shadow
What can you do to enhance the visibility of specular reflectors? - Correct answer-
perpendicular incidence
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, What tissue/sound interaction is primarily responsible for imaging internal
structures of organs? - Correct answer-scattering
What tissue/sound interaction is necessary for an ultrasound image? - Correct
answer-reflection
For soft tissues, what is needed for determining what a specific impedance is? -
Correct answer-bulk modulus and interface
You are imaging a structure that is highly attenuating. What imaging artifact would
you expect to encounter? - Correct answer-shadowing
Does sound travel slower through air or through soft tissue? - Correct answer-air
An increase in transmit power changes what? - Correct answer-acoustic power
What would you change if image does not show adequate penetration in far field
and shows noise instead of tissue? - Correct answer-decrease the transmit
frequency because lower frequency penetrates better
What is the range of frequencies for human hearing? - Correct answer-20Hz -
20,000Hz
Maximum cyclical change in quantity is known as? - Correct answer-amplitude
Bulk modulus is closely related to? - Correct answer-stiffness
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
