5-16 Image Optimization
5.8.2 PW Mode Image Parameters
In PW mode scanning, the image parameter area in the upper right corner of the screen
displays the real-time parameter values as follows:
When you adjust the depth of the B mode image, related changes will occur in PW mode
image as well.
5.8.3 PW Mode Image Optimization
Gain
This function is intended to adjust the gain of spectrum map. The real-time
gain value is displayed in the image parameter area in the upper right corner
of the screen.
Rotate the [Gain/iTouch] knob to adjust the gain.
The adjusting range is 0-100.
Increasing the gain will brighten the image and you can see more received
signals. However, noise may also be increased.
Frequency
Refers to the operating frequency in PW mode of the probe, the real-time value
of which is displayed in the image parameter area in the upper left corner of the
screen.
Select the frequency value through the [Frequency] item in the image menu or
rotate the <Focus/Freq./THI> knob on the control panel.
Values of frequency vary depending upon the probe types.
Select the frequency according to the detection depth and current tissue
characteristics.
The higher the frequency, the better the resolution and sensitivity, and the
worse the force of penetration.
Baseline
Refers to the area where the velocity is zero in the spectrum.
Press the <Baseline> key on the control panel and rotate the Multifunctional
Knob on the right to adjust.
To change the range of flow velocity to optimize the image.
PW Steer
This function provides adjustment on angles for sampling line.
Adjust through the <Steer> key on control panel or [Steer] item on image
menu.
This feature is used to steer the direction of the beam so as to change the
angle between the beam and flow direction with immobility of the linear probe.
Values of steer angles vary by probe.
Steer is available only for linear probes.
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