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SPI: Artifacts Questions and Answers 100% Correct |
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SPI: Artifacts Questions and Answers100% Correct | 2024-2025
While using a linear sequential array transducer during a color Doppler exam, the
shape of the gray scale image is most often _____, whereas the shape of the color
Doppler portion of the image is _____.
A. rectangular, parallelogram
B. rectangular, sector
C. sector, trapezoid
D. square, rectangular - ANSWER A. rectangular, parallelogram
what is the meaning of the term "analysis" in the context of spectral analysis of
doppler signals
a. building a sophisticated signal from components
b. building a simplified signal from components
c. identifying the building blocks or components of a complex signal
d. measuring a complex signal, then modifying its information content -
ANSWER c. identifying the building blocks or components of a complex signal
The analysis of Doppler spectra using _______ is more accurate.
A. zero-crossing detectors
B. fast Fourier transforms
C. time interval histograms
D. Chirp-Z transforms - ANSWER B. fast Fourier transforms
, Spectral analysis of color flow Doppler is most commonly performed by which of
the following techniques?
A. zero-crossing detectors
B. fast Fourier transforms
C. autocorrelation
D. Chirp-Z transforms - ANSWER C. autocorrelation
Acoustic artifacts include: (more than one answer may be correct)
A. images of reflectors in an inappropriate position
B. images of reflectors with improper shape
C. images of reflectors with incorrect brightness
D. images that do not correspond to anatomical structures - ANSWER a, b, c &
d
which of the following is not a potential cause of artifact in diagnostic imaging
a. operator error
b. equipment malfunction
c. patient motion
d. ultrasound physics
e. none of the above - ANSWER e. none of the above
ultrasound systems are designed to automatically ___
a. display similar structures with equal brightness, regardless of depth
b. position structures at the correct depth, regardless of the medium
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