Terason t3000, Руководство пользователя

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Chapter 5 - Working With Scan Modes Scan Modes Overview
Terason t3000 / Echo Ultrasound System User Guide 95
Adjusting the Focus
Focus optimizes the image by increasing the resolution for a specific area. The depth ruler
uses a pink triangle to indicate the focus depth. This indicator is only visible if you show
the depth ruler.
When you select an exam type, the software updates the focus value to a preset value for
the specific exam type, transducer, and patient size.
In 2D, you can set up to four focus depths. In all the other modes, you can set only one
focus depth. When you use more than one focus depth, you can choose the distribution of
the focus depths.
To set the focus depth for any mode other than 2D, or for a single focus point in 2D, select
a value (in cm) from the @ pull-down menu.
Setting the Focus (Non-2D)
You can also use the left and right arrow buttons to increase or decrease the focus depth.
To set multiple focus depths in 2D, complete these steps:
1. From the @ menu, select the primary focus depth. You can also use the left and right
arrow to increase or decrease the depth.
2. From the # menu, select the number of focus points.
3. From the focus distribution menu, select a distribution method .
Focus Distribution List
In the focus distribution menu:
• spaces the focus depths densely, centered on the primary focus depth
• spaces all but the deepest focus depth densely
• spaces the focus depths widely, centered on the primary focus depth
The actual spacing of the focus depths depends on the number of points selected and
on the depth
Adjusting the Gain
2D gain allows you to increase or decrease amplification of the returning echoes, which
increases or decreases the amount of echo information displayed in an image.
Note: Increasing the number of focal zones decreases the frame rate.