fix(segmentation overlay): update viewport ds list upon seg delete - OHIF-2425 #5729

dxlin · 2026-01-20T03:32:19Z

Context

A potential solution for
#5728
(Also a test noted in #5498)

Overlay UI is missing segmentations when they are added then removed from the segmentation panel as it is still contained in the viewport's display set list.

Changes & Results

Segmentation displayset layer is removed as part of the segmentation delete routine. Additionally, for segmentations created within viewer and not from an image source, it is cleaned up from the overall display set list (so as not to clutter the UI).

Testing

User is now able to add segmentation via overlay UI, delete (whether by accident or on purpose), and still add it back to same viewport via overlay UI without refreshing page.

Checklist

PR

[] My Pull Request title is descriptive, accurate and follows the
semantic-release format and guidelines.

Code

[] My code has been well-documented (function documentation, inline comments,
etc.)

Public Documentation Updates

[] The documentation page has been updated as necessary for any public API
additions or removals.

Tested Environment

System:
OS: Windows 11 10.0.26200
CPU: (16) x64 Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
Memory: 2.85 GB / 15.72 GB
Binaries:
Node: 22.16.0
Yarn: 1.22.22
npm: 10.9.2
Browsers:
Chrome: 144.0.7559.59
Edge: Chromium (143.0.3650.66)

[] OS:
[] Node version:
[] Browser:

-resolves segmentation missing from list (from when PACS) -safety check for missing representation (for when segmentation is deleted)

…tted to PACS)

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dxlin · 2026-01-20T03:37:32Z

Quick note that this only resolves for segmentations, RTStructs are still under investigation (is not able to be loaded a second time after the first delete).

jbocce · 2026-01-20T19:05:16Z

Fixes #5728
Closes OHIF-2425

…ateViewportDSListUponSegDelete

…again in removeDisplaySetLayer)

dxlin · 2026-01-26T07:50:51Z

Hi @jbocce,

Latest commit for PR now correctly works for both segmentations and RTStructs. removeDisplaySetLayer handles segmentation representation so was not needed to be removed again.

As the commands for delete segmentation and removeDisplaySetLayer are pretty close, would it make sense to incorporate the displaySetService.deleteDisplaySet(segmentationid) snippet to removeDisplaySetLayer (this should also fix nothing happening when a segmentation created within the ohif is removed as a layer from overlay menu unless that is desired behaviour)?

extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts

extensions/cornerstone/src/commandsModule.ts

jbocce

Thanks very much for this. See my comments. Also as I noted in a private conversation with you please address removing a segmentation from a viewport as well. See the video...

ScreenHunter.Jan.29.10.34.mp4

…ateViewportDSListUponSegDelete

…play set)

dxlin · 2026-01-30T07:49:34Z

Added relevant code within removeSegmentationFromViewport as well; however, after pulling most recent commits (likely Jan. 27 ones) I'm running into a number of new issues with segmentations, will try to work through and apply suggestions noted in comments as well.

An example of new issue is I'm sometimes finding segmentations previously removed added back in now (additionally, adding segmentations to one viewport will end up adding it to other viewports with images that share a FoR).

…SListUponSegDelete

- add segmentationExists check to getSopClassHandlerModule - now firing SEGMENTATION_REMOVED and SEGMENTATION_REPRESENTATION_REMOVED events - centralized segmentation removal in a listener - when a segmentation is deleted (completely), remove it from all viewports it overlays - when a segmentation is removed from a viewport, remove it as overlay from the viewport

jbocce · 2026-02-12T03:38:51Z

extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts

    eventTarget.removeEventListener(
      csToolsEnums.Events.SEGMENTATION_REMOVED,
-      this._onSegmentationModifiedFromSource
+      this._onSegmentationRemovedFromSource


I think this makes more sense than what was there before. Now we actually fire the SEGMENTATION_REMOVED event!

jbocce · 2026-02-12T03:39:02Z

extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts

    eventTarget.removeEventListener(
      csToolsEnums.Events.SEGMENTATION_REPRESENTATION_REMOVED,
-      this._onSegmentationRepresentationModifiedFromSource
+      this._onSegmentationRepresentationRemovedFromSource


Same goes for this one.

jbocce · 2026-02-12T03:40:21Z

extensions/cornerstone-dicom-rt/src/getSopClassHandlerModule.ts

    loadPromises[SOPInstanceUID] &&
-    cachedRTStructsSEG.has(rtDisplaySet.displaySetInstanceUID)
+    cachedRTStructsSEG.has(rtDisplaySet.displaySetInstanceUID) &&
+    _segmentationExists(rtDisplaySet)


When an RTSTRUCT contour segmentation was deleted completed and then reloaded it wouldn't. So this check forces the reload when it no longer exists.

sedghi · 2026-02-12T03:53:48Z

extensions/cornerstone/src/commandsModule.ts

+
+      const displaySet = displaySetService.getDisplaySetByUID(segmentationId);
+      if (displaySet) {
+        commandsManager.runCommand('removeDisplaySetLayer', {


what is removeDisplaySetLayer? i can't find it in our codebase

dxlin added 2 commits January 19, 2026 21:13

-remove display set from viewport when segmentation deleted

b7702c8

-resolves segmentation missing from list (from when PACS) -safety check for missing representation (for when segmentation is deleted)

-fix for deleting segmentations creating within viewer (and not commi…

30c256e

…tted to PACS)

jbocce self-requested a review January 20, 2026 18:45

jbocce changed the title ~~Fix/update viewport ds list upon seg delete~~ Fix/update viewport ds list upon seg delete - OHIF-2425 Jan 21, 2026

dxlin added 2 commits January 25, 2026 23:34

Merge branch 'master' of https://github.com/ohif/viewers into fix/upd…

b0ea40d

…ateViewportDSListUponSegDelete

-prevent duplicate segmentation removal (deleteSegmentation and then …

3f048b9

…again in removeDisplaySetLayer)

jbocce reviewed Jan 29, 2026

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extensions/cornerstone/src/services/SegmentationService/SegmentationService.ts Outdated Show resolved Hide resolved

jbocce reviewed Jan 29, 2026

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extensions/cornerstone/src/commandsModule.ts Outdated Show resolved Hide resolved

jbocce reviewed Jan 29, 2026

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extensions/cornerstone/src/commandsModule.ts Outdated Show resolved Hide resolved

jbocce requested changes Jan 29, 2026

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dxlin added 2 commits January 30, 2026 01:58

Merge branch 'master' of https://github.com/ohif/viewers into fix/upd…

4a236b6

…ateViewportDSListUponSegDelete

-handle remove from viewport command (similar to delete, but keep dis…

68c52c1

…play set)

Merge remote-tracking branch 'origin/master' into fix/updateViewportD…

84d1bdb

…SListUponSegDelete

jbocce changed the title ~~Fix/update viewport ds list upon seg delete - OHIF-2425~~ fix(segmentation overlay): update viewport ds list upon seg delete - OHIF-2425 Feb 12, 2026

jbocce reviewed Feb 12, 2026

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jbocce requested a review from sedghi February 12, 2026 03:41

sedghi reviewed Feb 12, 2026

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fix(segmentation overlay): update viewport ds list upon seg delete - OHIF-2425 #5729

fix(segmentation overlay): update viewport ds list upon seg delete - OHIF-2425 #5729

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dxlin commented Jan 20, 2026

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