Samsung SONOACE R7 Manual de usuario Pagina 185

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Chapter 5 Measurements and Calculations
Common Measurement Methods
This section provides information on the common measurement methods used for applications.
Measurements in Spectral Doppler Mode
In general, if you trace a Doppler spectrum, you can obtain results for various measurement items
automatically. There are 3 ways to trace a Doppler spectrum.
SONOACE R7 also allows you to select a specific item under the Measurement menu and take
measurements individually without tracing a Doppler spectrum.
Auto Trace
A spectrum is traced automatically. It is enabled in the Measurement menu in Spectral Doppler Mode.
1. Press Auto Trace in the Measurement menu.
2. The system traces a spectrum automatically.
3. When Trace is complete, the measurement results are displayed on the screen.
Tips!
Things to consider for Doppler Spectrum Auto Trace
The state of a Doppler spectrum may affect measurement results. Please see the following:
Causes for Trace Failure
-
If Gain is changed for a Doppler image in the Freeze state, Contour Trace and Peak Trace will not work.
-
If there is little or no noise in an image without a spectrum, Contour Trace will not work.
-
If there is severe noise in an image, Contour Trace will not work.
-
If the Clutter filter is set too high, Auto Trace or Limited Trace may not work.
Causes for Inaccurate Peak Trace
-
If PRF (Pulse Repetition Frequency) is lower than the velocity of the observation area, aliasing
may occur. If the original signals are separated from aliasing, Trace can be done but the peak
measurement may not be accurate.
-
If the peak of a spectral waveform is not clear or occurs intermittently, Trace can be done but the
peak measurement may not be accurate.
-
If the Doppler Gain is set to high or low, it becomes difficult to distinguish spectrums. This may result
in measurement error(s).
-
If the Wall Filter is set too high, only part of the spectrum is displayed. In this case, Trace can be done
but Peak measurement may not be accurate.
-
If abnormal noise or artifact occurs, Trace can be done but Peak measurement may not be accurate.
Misc.
-
Limited Trace is supported only for two-peak spectrums such as Mitral Valve Inflow and Tricuspid
Valve Inflow in the cardiology application.
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Comentarios a estos manuales

Prof Akhigbe 24 Apr 2024 | 14:29:06

I want to learn how to do angle correction on PW Doppler on my machine.

Prof Akhigbe 24 Apr 2024 | 14:30:30

How do I assess PW angle cursor?

Prof Akhigbe 24 Apr 2024 | 14:40:21

I don't want to join the group.