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feat(core): ECG GenericViewport as primitive with AABB2 traceRegions - #2899
Harshika-Chandvani wants to merge 7 commits into
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Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughThe ECG implementation derives calibrated metrics, layouts, and transforms from ChangesECG calibration and layout rendering
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant LegacyAdapter
participant ECGViewport
participant ECGResolvedView
participant CanvasECGRenderPath
LegacyAdapter->>ECGViewport: update presentation or camera
ECGViewport->>ECGResolvedView: resolve waveform and view state
ECGResolvedView->>ECGResolvedView: compute metrics, layouts, and transforms
CanvasECGRenderPath->>ECGResolvedView: read resolved rendering state
CanvasECGRenderPath->>CanvasECGRenderPath: draw calibrated ECG content
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Scrolling multi-column ECG layouts can show incomplete or blank traces, and legacy focal-point camera operations can pan unexpectedly. These interaction risks should be addressed before merge. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Actionable comments posted: 3
- 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
In
`@packages/core/src/RenderingEngine/GenericViewport/ECG/ECGViewportLegacyAdapter.ts`:
- Around line 210-222: Update setFocalPoint to verify that
resolvedView.channelLayouts contains a layout whose leadIndex matches
Math.round(focalPoint[2]) before calling worldToCanvas or changing the pan.
Return immediately when no matching cell exists; preserve the existing pan
adjustment for matched focal points.
In `@packages/core/src/utilities/ECGUtilities.ts`:
- Around line 828-849: Update drawECGTraces to bypass the global timeRange
clipping only for explicitly marked non-rhythm multi-column cells, preserving
their original fixed partition ranges and durations. Do not infer this exception
from startSample or endSample, since 12x1 and rhythm cells also have those
fields; keep the existing clipping behavior for all other cells and retain the
baseline handling for empty truncated-channel windows.
- Around line 36-58: Update the calibrated ECG rendering flow rooted at
ECGResolvedView, channel layout, and CanvasECGRenderPath to retain each
channel’s own positive mvPerUnit-derived scale through metrics and trace
drawing, instead of reusing the first value from getECGMvPerUnit. Preserve the
existing legacy auto-fit behavior as a separate path when sensitivityMmMv is not
positive.
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packages/core/src/RenderingEngine/ECGViewport.tspackages/core/src/RenderingEngine/GenericViewport/ECG/CanvasECGRenderPath.tspackages/core/src/RenderingEngine/GenericViewport/ECG/ECGResolvedView.tspackages/core/src/RenderingEngine/GenericViewport/ECG/ECGViewport.tspackages/core/src/RenderingEngine/GenericViewport/ECG/ECGViewportLegacyAdapter.tspackages/core/src/RenderingEngine/GenericViewport/ECG/ECGViewportTypes.tspackages/core/src/RenderingEngine/GenericViewport/ECG/ecgProjectionSnapshot.tspackages/core/src/utilities/ECGUtilities.tspackages/core/test/ecgResolvedView.jest.jspackages/core/test/ecgViewport_test.jspackages/core/test/viewportProjectionService.jest.jspackages/metadata/src/utilities/metadataProvider/ecgFromInstance.tspackages/metadata/test/ecgChannelSensitivity.jest.js
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…s and guard focalPoint pan
Review of PR #2899: correctness, Generic Viewport design, display set and metadataThis review covers the head of The reference for the design items is the Generic Viewport code design The order is: correctness defects (§ 1), Generic Viewport design (§ 2), display Summary
1. Correctness defects1.1 The deprecated
|
| Fact | Owner now | Correct owner |
|---|---|---|
| The selection of the waveform group | ecgFromInstance (groups[0]) |
The split rule, or a display set attribute |
| The lead identity (code) | A regular expression on the name, in core | The ECG metadata module |
The channel name form, the mvPerUnit default |
loadECGWaveform in core utilities |
The ECG metadata module |
| The lead count, the duration and the sampling frequency for the layout choice | The loaded waveform only | IDisplaySet attributes from the ecg split rule |
displaySetId to SOP image id |
genericViewportDisplaySetMetadataProvider |
IDisplaySet.underlyingImageIds, through the shared access module |
| The layout presets | The demo (ecgLayouts) |
The application. No change. |
4. Tests, comments and the scope of the change
Tests. ecgResolvedView.jest.js and ecgRenderMetrics.jest.js test what
the API must do: the geometry before the first draw, and the round trip through
each cell. Those are the right kind of tests. The layout identity tests
(ecgChannelLayouts.jest.js) are in PR #2900 and not here. These cases have no
test:
scroll()andscrollToTime()(§ 1.4).- The agreement of the transform and the draw after a change of
timeRange
(§ 1.3). - The deprecated
ECGViewportwith a signal longer than 5000 samples (§ 1.1). - A
12x1layout with fewer than 12 visible leads (§ 1.2).
Add these four. Do not add tests for internal null checks.
Comments. Several inline comments have 4 to 7 lines, and they describe what
"the previous code" did. Put the history in the commit message. Put the rule in
the doc comment of the function, and keep the inline comment to one or two
lines.
Scope. The PR changes behaviour that a user sees, and the description does
not say so:
- the meaning of the calibration on the screen (§ 1.7),
- the 12-row minimum (§ 1.2),
- the output of the deprecated class (§ 1.1).
List each change of user-visible behaviour in the description, separately from
the code changes.
5. Suggested order of work
| Step | Work | Closes | Size |
|---|---|---|---|
| 1 | Merge origin/main into PR #2900 and PR #2901. |
— | Small |
| 2 | Decide between TraceRegion and layoutType. |
§ 2.1 | A decision |
| 3 | Fix the deprecated class and the row count. | § 1.1, § 1.2 | Small |
| 4 | Apply the time window in the resolved view, and fix scroll(). |
§ 1.3, § 1.4 | Medium |
| 5 | Keep the lead position fixed when a lead is hidden. | § 1.5 | Small |
| 6 | Fix the labels and the sensitivityMmMv documentation. |
§ 1.6, § 1.7 | Small |
| 7 | Remove the types/index.ts block. Add getCurrentMode(). Call getGenericViewportSourceDataId. Correct the PR description. |
§ 2.4, § 2.5, § 2.6, § 3.1 | Small |
| 8 | Import the constant and the type from @cornerstonejs/metadata, and move the name clean-up into the metadata module. |
§ 3.2 | Small |
| 9 | Move the ECG code into GenericViewport/ECG/. |
§ 2.3 | Medium |
| 10 | Move the six geometry options into ECGViewState. |
§ 2.2 | Medium. It changes the public API. |
| 11 | Cache the resolved view. | § 1.8 | Small |
| 12 | In a separate pull request on the metadata package: lead codes, the selection of the waveform group, and the display set attributes for the layout choice. | § 3.3, § 3.4, § 3.5 | Medium |
Steps 3 to 8 carry no design risk. Do step 2 first, because the answer changes
steps 4, 9 and 10. Step 10 changes the public API, so do it before the first
release of these options.
🤖 Generated with Claude Code
Follow-up: method types of
|
| Method | PlanarViewport |
ECGViewport |
Change for ECG |
|---|---|---|---|
setDisplaySets |
{ displaySetId; options?: PlanarSetDataOptions }[] |
{ displaySetId }[], with no options |
Accept options?, so that a caller can give a role or an overlay |
resetViewState |
(options?: PlanarResetViewStateOptions), with resetPan, resetZoom, resetOrientation, resetFlip |
() |
Add ECGResetViewStateOptions with resetPan, resetZoom and resetTimeRange |
scroll |
(delta: number): Promise<string>. One slice. |
(delta = 1, _debounceLoading, _loop): void. One screen of time. |
See § 1.2 |
getCurrentImageId |
(viewRefSpecifier?), returns an image id |
(), returns the display set id |
See § 1.1 |
getImageData |
(volumeId?), returns … | undefined |
(), returns CPUIImageData | null |
Return undefined when no data is mounted, as Planar does |
getSourceDataId |
Present | Absent. hasImageURI does the lookup itself. |
Add the method, and call it from hasImageURI |
getCurrentMode |
Present | Absent. The base answer is 'unknown'. |
Return 'ecg' or 'empty' |
hasImageId |
Present | Absent | Add the method, with the lookup of § 1.1 |
getResolvedView |
({ frameOfReferenceUID, sliceIndex }) |
() |
No change. The base class declares no parameters. |
3. The legacy adapter
| Method | PlanarViewportLegacyAdapter |
ECGViewportLegacyAdapter |
Change for ECG |
|---|---|---|---|
getCamera |
PlanarViewState & ICamera<PlanarScaleInput> |
ICamera |
ECGViewState & ICamera<…>, with the scale type that ECGResolvedView.buildICamera() returns |
setCamera |
Partial<ICamera<PlanarScaleInput> & PlanarViewState> |
Partial<ICamera> |
The same form. A legacy caller can then set timeRange through setCamera. |
resetCamera |
(options?: Parameters<PlanarViewport['resetViewState']>[0]). The adapter sends the options to resetViewState. |
(_options?: unknown). The adapter ignores the options. |
The same Parameters<…> form, after resetViewState accepts options |
getViewPresentation, setViewPresentation |
PlanarViewPresentationSelector, PlanarViewPresentation |
ViewPresentationSelector, ViewPresentation |
Add ECG types only if the ECG presentation has fields of its own. Otherwise, no change. |
setProperties |
(properties = {}, volumeIdOrSuppressEvents?, suppressEvents = false) |
(props) |
Add suppressEvents |
getProperties, resetProperties |
(volumeId?) |
() |
No change. An ECG viewport mounts one waveform. |
| The data setter | setStack(…): Promise<string> |
setEcg(…): Promise<void> |
No change. Each one matches its legacy class. |
4. Suggested changes, in order
- The id lookup:
getSourceDataId,hasImageId, and the source image id in
getCurrentImageId,getImageIdsand the view reference (§ 1.1). ECGResetViewStateOptions, andresetCamerasends the options to
resetViewState(§ 2, § 3).ECGViewState & ICamera<…>ingetCameraandsetCamera(§ 3).- The
scrollsignature and thegetCurrentMode()test in
utilities/scroll.ts(§ 1.2).
Steps 1 to 3 are small, and they stay inside the ECG family. Step 4 also
changes a shared utility.
🤖 Generated with Claude Code
2 participants
🥞 PR Stack
TraceRegiondeclaration)Context
Following the architecture discussion in OHIF Office Hours and the Modular Waveform Viewport Integration RFC, this PR introduces the Layer 1 Primitive ECG Viewport in
@cornerstonejs/core.Key design alignments implemented in this PR:
GenericViewportremains an abstract base class.ECGViewportextends it as a concrete subclass.mm/s,mm/mV). Text labels (e.g., "I", "aVR", "V1-V6") and region bounding boxes are decoupled to Layer 2 (WaveformRegionOverlayToolin@cornerstonejs/tools).AABB2: Supports normalized (0.0–1.0)AABB2traceRegionsto flexibly accommodate12x1,6x2,3x4+1, and 15-lead/21-lead setups without hardcoded layout math in Core.canvasToWorldandworldToCanvasmapReference: OHIF/Viewers#6068
Changes & Results
packages/core/src/RenderingEngine/GenericViewport/ECG/ECGViewportTypes.ts:TraceRegioninterface utilizing Cornerstone3D's standardAABB2(minX, maxX, minY, maxYin0.0–1.0floats),leadIndices: number[], andtimeWindow?: [number, number].traceRegions?: TraceRegion[]toECGPresentationProps.packages/core/src/RenderingEngine/GenericViewport/ECG/CanvasECGRenderPath.ts:drawECGLabels) to ensure Layer 1 functions strictly as a pure graphic primitive.packages/core/src/RenderingEngine/GenericViewport/ECG/ECGResolvedView.ts:canvasToWorldreturns[time/sample, voltage, regionIndex],worldToCanvasmapsWhat are the effects of this change?
AABB2region support and tool-isolatedTesting
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