Segmentation (SEG) objects light edit

Relabel or adjust metadata on DICOM Segmentation objects.

Problem

You have a DICOM Segmentation (SEG) object containing multiple segments — Liver, Tumor, Kidney — and you need to remove one segment (e.g. the Liver segment was auto-generated with poor quality and needs to be discarded). You also want to verify that SEG overlay rendering works when the segmentation is active.

Steps

Delete a Segment

1. Open the SEG DICOM file (⌘O) — e.g. seg-test.dcm.

2. Navigate to the SEG tab in the right rail. Wait for the UI transition to settle.

3. Delete a segment — locate “Liver” in the segment list and delete it. The segment is removed from the segmentation object.

Overlay Rendering

4. Toggle Overlays — the Overlays button in the top bar is visible when a SEG or RTSTRUCT is loaded. Click it to toggle segmentation overlay rendering ON. The button highlights to indicate active state.

5. Toggle off and on — click the Overlays button again to turn it off (highlight removed), then click again to turn it back on. The state toggles stably without errors.

Expected Result

• Segment deletion: The Liver segment is removed from the DICOM Segmentation object. Other segments are untouched.
• Overlay toggle: The Overlays button toggles between on/off states stably. Round-trip (off → on → off → on) works without errors.
• The overlay toggle is only visible when segmentation or RTSTRUCT data is present in the study.