Terason t3000, Руководство пользователя

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Chapter 5 - Working With Scan Modes Using Spectral Doppler Image Controls
Terason t3000 / Echo Ultrasound System User Guide 115
Shortcut Menu
4. Select Set PWD Gate .
The Terason software locks the sample volume indicator in the position where you right-
clicked and adds the Time Series window for PWD mode. You can now adjust the SV size,
depth, or correction angle as needed for the scan. If you are already in PWD mode,
moving the gate position does not interrupt the Time Series window display.
Adjusting Spectral Gain
The gain setting on the PWD or CWD tab (not the gain setting on the 2D tab) increases or
decreases the amplification of the returning signal (live or playback) for the Time Series
display. The gain should be adjusted so that the spectral waveform is bright, but not so
high that the systolic window fills in, or other artifacts are created.
To adjust the gain, click the slider and drag it to the left to decrease the gain, or drag it to
the right to increase the gain.
Spectral Doppler Gain Control
You can also adjust the gain by clicking on the slider (a blue box displays around the
slider) and using the left and right arrow keys.
The Image
>
Gain menu adjusts the 2D gain, not the CWD or PWD gain.
You can adjust gain for live images or saved loops being played. You cannot adjust the
gain for frozen images or paused loops.
Compression
The Compress slider controls signal compression, which affects the contrast of the image.
A number to the left of the slider indicates the amount of compression, from – 50 to 50.
Drag the slider to the right to increase compression, which darkens the image, or drag the
slider to the left to decrease compression.
Compress Slider