Samsung SONOACE R7 Manual de usuario Pagina 178

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Operation Manual
Doppler Signal Adjustment
X During velocity measurement, an error may occur depending on the cosine angle between the blood
ow and the ultrasound beam.
X For Doppler velocity measurements, the most accurate results can be ensured when the ultrasound
beam is aligned in parallel with the blood ow.
X If that is not possible, the angle between them should be adjusted by using the
Angle
option.
Aliasing
X PW Spectral Doppler Mode uses a signal sampling technique to calculate the frequency (or velocity)
spectrum.
X Adjust the baseline or the velocity scale to minimize aliasing. A lower frequency probe can also be
used to reduce aliasing.
X Aliasing is dramatically reduced in CW Spectral Doppler Mode.
Calculation Equation
X Some of the calculation equations used for clinical purposes originate from hypotheses and
approximation.
X All calculation equations are based on medical reports and articles.
Human Error
X Human error may occur due to inappropriate use or lack of experience.
X This can be minimized through compliance with and thorough understanding of the manuals.
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