VDO MG 2100 Specifiche Scaricare il pdf (Pagina 297)

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Rev 1.1 VisualSonics Vevo 2100 Imaging System Operator Manual 297

Chapter 42: Analyzing 3D-Mode images

The system prompts you to set a Rotational Axis. You can set the axis of

rotation by clicking once at one end of the axis of rotation and then

clicking at the other end.

The axis of rotation should run through entire volume region as shown in

the following illustration:

c. Click to create a point on the circumference of a contour.

d. Trace the contour. The system adds points as you trace.

e. To complete the contour, right-click the last point, or left-click near the

first point.

The contour is displayed in the Contour List as

3D Volume 1 -- 001 if

this is the first contour of the first volume measurement on the image. The

contour color changes from blue to the specified color.

If the position of the trackball cursor is within five pixels of the previous

caliper when you right-click, the previously placed caliper is considered to

be the last caliper for the measurement. This applies to 3D-Mode polygon

measurements and for 3D-Mode volume contours.

f. Click Refine to initiate the edge detection algorithm. This function detects

the edge of the vessel or volume wall and attempts to closely fit the line to

the outside wall of the vessel or volume. The Refine function can be

repeated to achieve the closest possible fit.

The Refine function achieves the best results when the contour is drawn

just outside the boundary of the anatomical structure.

Initial contour Refined contour

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VDO MG 2100 Specifiche Pagina 297

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