Measuring Sloped CTR
Introduction
The sloped CTR option enables you to measure diagonally between points that you select on an image.
While the unit of measure defaults to millimeters, you can optionally reset an existing annotation to centimeters or inches.
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Note: |
To ensure valid results, your monitor should be calibrated before you measure anything in or on the images that it displays. |
Steps
- Right-click the image to display a context menu.
- Select Annotations > CTR (6-point).
- Click the image for the first point of a slope line.
- Click the image a second time to establish the slope. Subsequent measurement lines are drawn parallel to the first slope line. Subsequent measurement lines are drawn parallel to the first line.
- Add the four lines of measurement, click once for each line. After Synapse displays the four CTR lines, additional clicks do not create additional measurement lines.
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Note: |
The initial line disappears when the CTR measurement is established. |
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Optional: Click any measurement line and drag to reposition it, if necessary. Repositioning does not affect the angle of a line, only its distance from other measurement lines.
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Note: |
You cannot draw two different CTR annotations on the same image. |
Results
Synapse displays a ratio of the line length measurements, showing both the distance between the lines closest to each other and the distance between the lines furthest from each other.
Additional Options
Click CTR (6-point) 
on the icon menu.