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300 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1

Chapter 42: Analyzing 3D-Mode images

Initial contour

Refined contour

6. You can draw subsequent contours can be drawn manually or semi-

automatically. Select the preferred parallel segmentation parameters in the

Segmentation area of the Volume tool.

a. Set the Step Size. The default step size is the scan step size.

b. Set the Direction of segmentation: Inward, Outward, or Both.

c. Set whether you are going to use manual or semi-automatic segmentation.

 To use manual segmentation set the Step Num to 1

 To use semi-automatic segmentation, set the Step Num to a value of

two or more.

When you use semi-automatic segmentation, the system generates the

contours automatically. Each contour is refined before the next contour

is drawn.

d. To generate additional contours, click Proceed. If you use manual

segmentation the system draws and refines the next contour. If you use

semi-automatic segmentation the system creates the number of contours

you specified in the Step Num field.

The Contour List displays the second contour as 3D Volume 1 -- 002.

7. Repeat the previous step as necessary until the desired number of contours

have been defined, and then click Finish.

You have successfully created the first calculated volume set for the image. If you

need a second volume you can create an additional set of contours.

Editing a volume contour

After you create a volume you can edit one or more of the contours.

f To modify a contour:

1. Select the contour in the Contour List.

2. Click a caliper point, drag it to a new position, then click to set the new

location.

3. Repeat the procedure for any other contour caliper points you want to edit.

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