SPI - final exam review Actual EXAM Questions with Detailed Verified
Answers / Already Graded A +
1. B: decrease rejection levels If the ultrasound image is
too black and white, which
Feedback: Rejection is used to reduce the of the following will add
amount of low level echoes displayed on the more levels of grey to the
image. If the image is too black and white, image?
reducing the rejection level will allow more
low level echoes to be displayed on the im- A: reduce the dynamic range
age.This will decrease the black and white B: decrease rejection levels
appearance and increase the levels of grey C: decrease compression
displayed the compression or dynamic range D: increase threshold levels
controls the number of gray displayed on the
image. The higher the dynamic range, the
more shades of gray displayed.
2. B: spatial compounding What system control should
be turned off when
Feedback: Spatial compounding reduces the attempting to demonstrate
aphantancent ponderinest adamants and posterior shadowing from a
important for accurate diagnosis, spatial suspected renal or biliary
compounding should not be used for the stone?
images. Posterior shadowing is a
distinguisbin? draursiones. A single focal A: time gain compensation
zone placed at the level of the highly attenu- B: spatial compounding
ating structure can improve the appearance C: color Doppler
of shadowing color doppler can be used to D: harmonic imaging
demonstrate the twinkle artifact
that is associated with a highly attenuating
lesion
3. C: to make the US beam more perpendicular Why did the Sonographer
to steer the US image during
the long axis of the needle the thyroid biopsy?
, A: to make the US beam more perpen-
Feedback: The purpose of the image is to dicular to the nodule to improve edge
document needle location within the nodule. enhancement
The best reflection occurs when the US beam B: to reduce the side lobe artifact
is perpendicular to the needle. The beam is C: to make the US beam more perpen-
steered to better visualize the needle and dicular to the long axis of the needle
adjust the angle of incidence to closer to 90 D: to reduce reverberation artifact
degrees. Reverberation will increase as the
beam becomes more perpendicular to the
needle with electronic steering.
4. A: focal zone The narrowest point of the
ultrasound beam is called:
Feedback: The narrowest point of the
ultrasound beam is called the focal zone. A: focal zone
Fresnel zone = near zone; Fraunhofer zone = B: Fresnel zone
far zone C: Fraunhofer zone
D: focal depth
5. A: the wider near field The main advantage of a
curvilinear transducer over
Feedback: Curvilinear transducers have a a vector transducer is:
wider near field which is verv heloful for fetal
evaluations. This is the main advantage of a A: the wider near field
curvilinear array transducer over a vector B: the smaller footprint
array transducer. C: the ability to perform CW Doppler
with 2D
imaging
, D: the ability to scan at increased frame
rates
6. B: dynamic range Which operator control can
be used to adjust the image
Feedback: Dynamic Range/Compression - contrast?
miage, changa the ginvasiselared in the
image; increased/larger dynamic range = A: output power
decreased image contrast B: dynamic range
C: focal zone
D:overall gain
7. A: increase image contrast Increasing the edge
enhancement setting will:
Feedback: Edge Enhancement Spatial high
pass filter used to emphasize change in A: increase image contrast
brightness across the image to make bound- B: produce a smoother image
aries of vessel walls and organs more promi- C: improve contrast resolution
nent. Produces 2D images with higher D: amplify reflections on the edges of
image contrast (lower contrast resolution) the image
and
brighter edges of structures. BUT it also
amplifies noise and speckle
8. A: anisotropy When tissues display varied
echogenicity depending on
Feedback: Anisotropy refers to when tissues the angle at which they are
display varied echogenicity depending on viewed, it is called:
the
angle at which they are viewed. It is typically A: anisotropy
seen in tendons and causes falsely B: clutter
hypoechoic areas of the tendon. It occurs C: speckle
when the transducer is not completely D: twinkle
, parallel to the tendon and the beam is not
perpendicular to the tendon. The artifact can
hreralecer he rockins the mans durall? roake
tendon. Curved tendons can be straightened
by muscular contraction.
9. B: improved contrast resolution Activating harmonic Imaging will result
in_____________.
Feedback: Harmonic imaging improves lat-
eral resolution because high frequency har- A: degraded lateral resolution
monic beam width is narrower and reduces B: improved contrast resolution
grating lobes; contrast resolution also im- C: increased production of grating
proves lobes
D: increased beam diameter
10. C: Increased line density will lead to a de- Which of the following
creased statements is true
frame rate. regarding decreased frame
rate?
Feedback: Increasing the scan lines will re-
quire a longer processing time before the A: Decreased frame rates are preferred
image is displayed. Slower frame rates will for real
cause "drag" on the image. When frame rates time 2D imaging.
decrease temporal resolution is degraded. B: Color Doppler evaluation requires a
Color Doppler requires faster frame rates to low frame
properly display blood flow. rate.
C: Increased line density will lead to a
decreased
frame rate.
D: Temporal resolution improves as the
frame
rate decreases
Answers / Already Graded A +
1. B: decrease rejection levels If the ultrasound image is
too black and white, which
Feedback: Rejection is used to reduce the of the following will add
amount of low level echoes displayed on the more levels of grey to the
image. If the image is too black and white, image?
reducing the rejection level will allow more
low level echoes to be displayed on the im- A: reduce the dynamic range
age.This will decrease the black and white B: decrease rejection levels
appearance and increase the levels of grey C: decrease compression
displayed the compression or dynamic range D: increase threshold levels
controls the number of gray displayed on the
image. The higher the dynamic range, the
more shades of gray displayed.
2. B: spatial compounding What system control should
be turned off when
Feedback: Spatial compounding reduces the attempting to demonstrate
aphantancent ponderinest adamants and posterior shadowing from a
important for accurate diagnosis, spatial suspected renal or biliary
compounding should not be used for the stone?
images. Posterior shadowing is a
distinguisbin? draursiones. A single focal A: time gain compensation
zone placed at the level of the highly attenu- B: spatial compounding
ating structure can improve the appearance C: color Doppler
of shadowing color doppler can be used to D: harmonic imaging
demonstrate the twinkle artifact
that is associated with a highly attenuating
lesion
3. C: to make the US beam more perpendicular Why did the Sonographer
to steer the US image during
the long axis of the needle the thyroid biopsy?
, A: to make the US beam more perpen-
Feedback: The purpose of the image is to dicular to the nodule to improve edge
document needle location within the nodule. enhancement
The best reflection occurs when the US beam B: to reduce the side lobe artifact
is perpendicular to the needle. The beam is C: to make the US beam more perpen-
steered to better visualize the needle and dicular to the long axis of the needle
adjust the angle of incidence to closer to 90 D: to reduce reverberation artifact
degrees. Reverberation will increase as the
beam becomes more perpendicular to the
needle with electronic steering.
4. A: focal zone The narrowest point of the
ultrasound beam is called:
Feedback: The narrowest point of the
ultrasound beam is called the focal zone. A: focal zone
Fresnel zone = near zone; Fraunhofer zone = B: Fresnel zone
far zone C: Fraunhofer zone
D: focal depth
5. A: the wider near field The main advantage of a
curvilinear transducer over
Feedback: Curvilinear transducers have a a vector transducer is:
wider near field which is verv heloful for fetal
evaluations. This is the main advantage of a A: the wider near field
curvilinear array transducer over a vector B: the smaller footprint
array transducer. C: the ability to perform CW Doppler
with 2D
imaging
, D: the ability to scan at increased frame
rates
6. B: dynamic range Which operator control can
be used to adjust the image
Feedback: Dynamic Range/Compression - contrast?
miage, changa the ginvasiselared in the
image; increased/larger dynamic range = A: output power
decreased image contrast B: dynamic range
C: focal zone
D:overall gain
7. A: increase image contrast Increasing the edge
enhancement setting will:
Feedback: Edge Enhancement Spatial high
pass filter used to emphasize change in A: increase image contrast
brightness across the image to make bound- B: produce a smoother image
aries of vessel walls and organs more promi- C: improve contrast resolution
nent. Produces 2D images with higher D: amplify reflections on the edges of
image contrast (lower contrast resolution) the image
and
brighter edges of structures. BUT it also
amplifies noise and speckle
8. A: anisotropy When tissues display varied
echogenicity depending on
Feedback: Anisotropy refers to when tissues the angle at which they are
display varied echogenicity depending on viewed, it is called:
the
angle at which they are viewed. It is typically A: anisotropy
seen in tendons and causes falsely B: clutter
hypoechoic areas of the tendon. It occurs C: speckle
when the transducer is not completely D: twinkle
, parallel to the tendon and the beam is not
perpendicular to the tendon. The artifact can
hreralecer he rockins the mans durall? roake
tendon. Curved tendons can be straightened
by muscular contraction.
9. B: improved contrast resolution Activating harmonic Imaging will result
in_____________.
Feedback: Harmonic imaging improves lat-
eral resolution because high frequency har- A: degraded lateral resolution
monic beam width is narrower and reduces B: improved contrast resolution
grating lobes; contrast resolution also im- C: increased production of grating
proves lobes
D: increased beam diameter
10. C: Increased line density will lead to a de- Which of the following
creased statements is true
frame rate. regarding decreased frame
rate?
Feedback: Increasing the scan lines will re-
quire a longer processing time before the A: Decreased frame rates are preferred
image is displayed. Slower frame rates will for real
cause "drag" on the image. When frame rates time 2D imaging.
decrease temporal resolution is degraded. B: Color Doppler evaluation requires a
Color Doppler requires faster frame rates to low frame
properly display blood flow. rate.
C: Increased line density will lead to a
decreased
frame rate.
D: Temporal resolution improves as the
frame
rate decreases
