Terason t3000, Руководство пользователя

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Chapter 5 - Working With Scan Modes Using Color and Power Doppler Image Controls
Terason t3000 / Echo Ultrasound System User Guide 119
Doppler Image Controls (Color Doppler Shown)
Although each mode adds a tab with the specific name of the selected mode, all the
Doppler modes except Power Doppler use the same image controls. When in Power
Doppler, a button enables Directional Power Doppler.
Adjusting the Scan Area
The size of the scan area (also referred to as the region of interest, or ROI) is one of the
major controls that affect the frame rate. The smaller the scan area, the faster the frame
rate. The larger the scan area, the slower the frame rate.
For cardiac or arterial applications, use a small scan area to accurately visualize the flow
dynamics. A medium or large scan might also be used for applications where the blood
flow dynamics do not change rapidly, or to get a larger overall view of blood flow.
You can move the scan area by clicking on the region of interest border, moving the ROI
to a new position, and clicking to anchor it. You can also type
a period ( . ) to select the
region of interest and use the keyboard arrows to move the region.
You can precisely resize the scan area by completing these steps:
1. Position the Windows pointer over one of the corners of the border defining the scan
area.
2. Click a corner.
3. Move the mouse or trackball until the scan area is the desired size.