Modifying Contours
Contents
Modifying contours
Repositioning contours
Resizing contours
You cannot collectively resize a group that consists of multiple contours; each contour must be resized individually. Except for point VOIs, you can resize any contour shape. For lines, only the length can be changed; the width cannot. To resize lines, go to "To resize contours".
3 Change, if you want, any of the other information in the dialog box.
Reshaping a contour
You can reposition a single anchor point at a time. If you need to redraw a portion of the contour, MIPAV allows you to reposition several contiguous anchor points with one motion of the mouse.
Retracing a VOI contour
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Trimming VOI anchor points
Trim parameter
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Specifies the number of anchor points you want the software to trim from the contour. Setting this value to zero causes only unnecessary anchor points on a straight 180-degree line to be pruned. Setting a higher value prunes all but the sharpest corners of the contour.
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Grouping and ordering contours
By default, when you draw multiple VOIs they appear grouped in a single group, and therefore all colored in the same color. To ungroup VOIs, select one VOI from the group, and then call VOI>VOI Grouping>Group VOIs. This will ungroup VOIs and they appear in the image in different colors. To group VOIs, select the VOIs which you would like to group (use Ctrl Shift right mouse combination of keys for multiple selection), and then call VOI>VOI Grouping>Group VOIs. This will group selected VOIs and they all appear in the image colored in the same color.
Grouping contours
Splitting VOI contours
Each result contour inherits the properties of its parent VOI. However, at any time, you can change the properties of result contours using the standard MIPAV tools (see [MIPAV_Segmentation.html#998415 "Contouring structures manually" ]).
To split a VOI
The result VOIs appears in the image, see [MIPAV_Segmentation.html#1656774 Figure 177].
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