Overview

• Task: Merge selected segments into one segment.
• Imaging modality: any

Prerequisites

• Have a segmentation with multiple segments.

Recommended workflow

Merge two segments:

• Select the first segment to be merged.
• Click Logical operators effect.
• Set Operation to Add.
• Select the second segment to be merged in the Add segment list.
• Click Apply.

Merge multiple segments:

• Select the segment that will contain the merged segments.
• Make visible the selected segment and all the segments that you want to merge and hide all other segments.
• Click Logical operators effect.
• In Masking section (near the bottom), set Editable area to Inside all visible segments.
• In logical operators effect options: uncheck Bypass masking and set Operation to Fill.
• Click Apply.

Example

Merge Segment_1, Segment_2, Segment_3 into one segment (Segment_1), while leaving Segment_4 as a separate segment.

• Download MRHead sample data set
• Go to Segment editor module, click Add button 4x to create 4 new segments.
• Select Paint effect and paint a few strokes into each segment.

• Hide Segment_4 to exclude it from merging.
• Select Segment_1 to designate it as the segment that will store the merging result.

• Click Logical operators effect. In Masking section (near the bottom), set Editable area to Inside all visible segments, uncheck Bypass masking, set Operation to Fill.

• Click Apply to merge the segments.
• Segment_2 and Segment_3 can now be deleted (they are overwritten by Segment_1 anyway because in Masking section Modify ether segments was set to Overwrite all)
• Segment_4 can be shown again.