Chapter 5 - Working With Scan Modes
Scan Modes Overview
Terason t3000 / Echo Ultrasound System User Guide
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Adjusting Smoothing
Changing the value in the smoothing field can make an image appear smoother. The
smoothing values are letters from A to E and represent different algorithms. Generally, the
amount of smoothness increases as you select higher letters. Note that smoothness is
subjective, and other image control settings affect how the smoothing algorithms work.
Choosing a higher smoothing level may not always result in a visibly smoother image.
When you increase the value in the field, the software increases the amount of
interpolation between scan lines, to make the image appear smoother. This also decreases
the frame rate. When you decrease the amount of smoothing, the amount of interpolation
between scan lines is decreased, making the image appear rougher, and the frame rate
increases.
To adjust the smoothness of the image, click the down arrow to the right of the Smoothing
field and select a value from the menu.
Selecting a Smoothing Option
You can also select
Image
>
Smoothing
to choose a different smoothing option.
Selecting a Smoothing Option from the Image Menu
Adjusting Persistence
Persistence refers to image frame averaging of real-time images or loops. When the
persistence rate is high, the image appears less speckled and smoother. However,
increasing the persistence rate also increases the possibility of a blurred image if the tissue
is moving when you freeze the image. When the persistence is low, the opposite is true.
To indicate the amount of frame averaging you want, click the down arrow to the right of
the persistence field and select a value from 0 to 7.
Choosing a Persistence Value
The 0 setting represents 0% and 7 represents 100% persistence.
You can also select
Image
>
Persistence
to choose a different setting.
