SPI Review - Davies Questions And Verified Answers |
Graded A+
1. Will not cause a redirection of part of the absorption
ultra- sound energy
2. You are scanning a large mass composed primarily axial misregistration of
ob-
of fat. What will you most likely encounter? ject distal to the mass on the
screen due to the slower
prop- agation speed
3. What 2 conditions must be present to cause a through fat
re- fraction in soundwave?
oblique incidence and
change in propagation
speed
4. What may be detected with refraction? lateral misregistration
5. Of the following structures, which is the most calcifications - leaves a
at- tenuating: blood, bile, lung tissue,
calcification? shadow
6. What can you do to enhance the visibility of specu- perpendicular
incidence
lar reflectors?
7. What tissue/sound interaction is primarily through soft
respon- sible for imaging internal structures of tissue?
organs?
8. What tissue/sound interaction is necessary for
an ultrasound image?
9. For soft tissues, what is needed for
determining what a specific impedance is?
10. You are imaging a structure that is highly
attenu- ating. What imaging artifact would
you expect to encounter?
11. Does sound travel slower through air or
1/
16
, SPI Review - Davies Questions And Verified Answers |
Graded A+
scattering
reflection
bulk modulus and interface
shadowing
air
2/
16
, SPI Review - Davies Questions And Verified Answers |
Graded A+
12. An increase in transmit power changes what? acoustic power
13. What would you change if image does not decrease the transmit
show adequate penetration in far field and
shows noise instead of tissue? fre- quency because
lower fre- quency
14. What is the range of frequencies for human penetrates better
hear- ing?
20Hz - 20,000Hz
15. Maximum cyclical change in quantity is known as? amplitude
16. Bulk modulus is closely related to? stittness
17. Time it takes for one ? period
18. If number of cycles in a pulse is increased but wave- pulse duration
length remains the same, what changes?
19. Which transducer would you use for a large patient lower frequency -
goes deeper
that would have the least amount of signal attenu-
ation?
20. Speed of ultrasound in bone? 4080 m/s
21. Speed of sound is defined as? speed at which sound
propa- gates through a
medium
22. Longitudinal wave is characterized by? it travels in one direction
23. What regions of a wave show decreased rarefaction
particle density in a medium?
24. Terms used to describe the strength of a
sound beam? amplitude,
intensity
3/
16
Graded A+
1. Will not cause a redirection of part of the absorption
ultra- sound energy
2. You are scanning a large mass composed primarily axial misregistration of
ob-
of fat. What will you most likely encounter? ject distal to the mass on the
screen due to the slower
prop- agation speed
3. What 2 conditions must be present to cause a through fat
re- fraction in soundwave?
oblique incidence and
change in propagation
speed
4. What may be detected with refraction? lateral misregistration
5. Of the following structures, which is the most calcifications - leaves a
at- tenuating: blood, bile, lung tissue,
calcification? shadow
6. What can you do to enhance the visibility of specu- perpendicular
incidence
lar reflectors?
7. What tissue/sound interaction is primarily through soft
respon- sible for imaging internal structures of tissue?
organs?
8. What tissue/sound interaction is necessary for
an ultrasound image?
9. For soft tissues, what is needed for
determining what a specific impedance is?
10. You are imaging a structure that is highly
attenu- ating. What imaging artifact would
you expect to encounter?
11. Does sound travel slower through air or
1/
16
, SPI Review - Davies Questions And Verified Answers |
Graded A+
scattering
reflection
bulk modulus and interface
shadowing
air
2/
16
, SPI Review - Davies Questions And Verified Answers |
Graded A+
12. An increase in transmit power changes what? acoustic power
13. What would you change if image does not decrease the transmit
show adequate penetration in far field and
shows noise instead of tissue? fre- quency because
lower fre- quency
14. What is the range of frequencies for human penetrates better
hear- ing?
20Hz - 20,000Hz
15. Maximum cyclical change in quantity is known as? amplitude
16. Bulk modulus is closely related to? stittness
17. Time it takes for one ? period
18. If number of cycles in a pulse is increased but wave- pulse duration
length remains the same, what changes?
19. Which transducer would you use for a large patient lower frequency -
goes deeper
that would have the least amount of signal attenu-
ation?
20. Speed of ultrasound in bone? 4080 m/s
21. Speed of sound is defined as? speed at which sound
propa- gates through a
medium
22. Longitudinal wave is characterized by? it travels in one direction
23. What regions of a wave show decreased rarefaction
particle density in a medium?
24. Terms used to describe the strength of a
sound beam? amplitude,
intensity
3/
16
