Auto Boundary - GE Precision 500D Operator's Manual

18-6Auto Boundary

NOTE:
18-7Running Length
om 5184516-100 Rev. 5
If there is already a vessel boundary present, it will be cleared from the display.
The cursor will be changed to a crosshair indicating the system is ready.
There are two different ways of entering centerline points:
Draw Line: To begin, you should position the cursor at the starting point along the
centerline of the vessel, and click–and–hold the left button on
the mouse (or other pointing device). Then move the cursor
along the path of the centerline area of the vessel. When the
cursor is at the last desired point, release then double–click the
left mouse button. The system will then automatically calculate
a vessel boundary starting at approximately the first control
point and ending at the approximately the last control point.
Position Points: To begin, you should position the cursor in the starting point, and
click the left button on the mouse. This will set the starting point
for the centerline measurement. The user would then move the
cursor to the next desired point along the centerline of vessel,
and click the mouse button again. A line will appear connecting
each point as it is set. Any number of points can be entered (min-
imum = 2). When the last point has been set, double–click the
left mouse button. The system will automatically identify the
edges of the vessel and calculate the occlusion information.
Clicking the right button on the mouse will erase the last entered point.
For either type of entry, once done the vessel profile (detected edges) will be
drawn on the screen. The system will then automatically display the Stenosis
Measurement Results window.
You can manually adjust the vessel limits and the Stenosis position in the same
manner as with the old version of the feature (select Edit Boundary button, then
point and drag a point to the desired location).
This feature involves identifying 2 or more points along the length of any anatomi-
cal area. Once all of the points have been entered, the system will automatically
calculate the total length of all the segments.
1. When the Length button is selected, any previously entered Length line will be
cleared from the display.
2. You can enter points for the line using either method described above for the
Auto Boundary feature.
3. Double–clicking the left button on the mouse will indicate all desired points
are entered.
This value will then be displayed on the screen next to the line control points
entered, (Example: " Length: x.xx mm"), and shown on the Stenosis Data Table.
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