SONOGRAPHY PRINCIPLES & INSTRUMENTATION Exam Questions And Answers 2024 Updated
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SONOGRAPHY PRINCIPLES &
INSTRUMENTATION Exam Questions And
Answers 2024 Updated
What is the purpose of microbubble contrast
imaging in ultrasound? - ANSWER-It enhances the
reflectivity of blood, improves the delineation of the
vessel wall, and aids in the detection of endoleaks
and...
SONOGRAPHY PRINCIPLES &
INSTRUMENTATION Exam Questions And
Answers 2024 Updated
What is the purpose of microbubble contrast
imaging in ultrasound? - ANSWER-It enhances the
reflectivity of blood, improves the delineation of the
vessel wall, and aids in the detection of endoleaks
and tissue perfusion in native and transplanted
kidneys.
What physical principle did Johann Christian
Doppler identify? - ANSWER-Doppler shift, which is
the mathematical difference between the
transmitted and received frequencies when
,structures are moving toward or away from the
"listener."
How does the Doppler shift change when blood
moves toward the transducer? - ANSWER-The
reflected sound has a higher frequency.
What does the ultrasound system calculate in
Doppler ultrasound? - ANSWER-Velocity, not speed.
What happens to the Doppler shift when blood flow
velocity increases? - ANSWER-The Doppler shift
increases.
What is B Mode flow imaging in ultrasound? -
ANSWER-A technique that maintains reflection
details in echoes from RBCs and provides more
hemodynamic information with increased visual
differentiation between true blood flow and wall
motion artifacts.
, What is the function of overall gain in 2D
ultrasound? - ANSWER-It adjusts the displayed
amplitude of the reflected sound waves on the
entire image.
How does time gain compensation work in
ultrasound imaging? - ANSWER-It allows varied
levels of amplification of the reflected sound waves
across the image, with near field gain usually set
lower to suppress reflections and far field gain set
higher to enhance reflections, compensating for
beam attenuation.
What happens to the pulse repetition frequency
(PRF) and frame rate when evaluating deeper
structures in ultrasound? - ANSWER-The PRF and
frame rate decrease.
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