Class: PlanarFreehandContourSegmentationTool

PlanarFreehandROITool lets you draw annotations that define an arbitrarily drawn region. You can use the PlanarFreehandROITool in all perpendicular views (axial, sagittal, coronal), support for oblique views is possible, but not yet supported, due to the implementation of getSubPixelSpacingAndXYDirections.

The resulting annotation's data and metadata (the state of the viewport while drawing was happening) will get added to the ToolState manager and can be accessed from the ToolState by calling getAnnotations or similar methods.

PlanarFreehandROITool annotation can be smoothed on drawing completion. This is a configured based approach. The smoothing process uses b-spline algorithm and consider 4 configurations properties:

smoothing.smoothOnAdd: to tell whether it should be smoothed or not (for editing it is considered the property smoothOnEdit) (default: false)
smoothing.smoothOnEdit: to tell whether it should be smoothed or not when editing (default: false)
smoothing.knotsRatioPercentageOnAdd: percentage of points from Segment that are likely to be considered knots during smoothing (for editing it is considered the property knotsRatioPercentageOnEdit) ( default: 40)
smoothing.knotsRatioPercentageOnEdit: same as knotsRatioPercentageOnAdd but applicable only when editing the tool (default: 40)

So, with that said the smoothing might occur when:

drawing is done (i.e mouse is released) and smoothing.smoothOnAdd is true. smoothing algorithm uses knotsRatioPercentageOnAdd
edit drawing is done (i.e mouse is released) and smoothing.smoothOnEdit is true. smoothing algorithm uses knotsRatioPercentageOnEdit and its only applied to changed segment smoothing does not occur when:
smoothing.smoothOnAdd is false and drawing is completed
smoothing.smoothOnEdit is false and edit is completed
drawing still happening (editing or not)

The result of smoothing will be removal of some of the outliers Changing tool configuration (see below) you can fine-tune the smoothing process by changing knotsRatioPercentageOnAdd and knotsRatioPercentageOnEdit value, which smaller values produces a more agressive smoothing. A smaller value of knotsRatioPercentageOnAdd/knotsRatioPercentageOnEdit produces a more aggressive smoothing.

cornerstoneTools.addTool(PlanarFreehandROITool)

const toolGroup = ToolGroupManager.createToolGroup('toolGroupId')

toolGroup.addTool(PlanarFreehandROITool.toolName)

toolGroup.addViewport('viewportId', 'renderingEngineId')

toolGroup.setToolActive(PlanarFreehandROITool.toolName, {
  bindings: [
   {
      mouseButton: MouseBindings.Primary, // Left Click
    },
  ],
})

// set smoothing aggressiveness while adding new annotation (ps: this does not change if smoothing is ON or OFF)
toolGroup.setToolConfiguration(PlanarFreehandROITool.toolName, {
  smoothing: { knotsRatioPercentageOnAdd: 30 },
});

// set smoothing to be ON while editing only
toolGroup.setToolConfiguration(PlanarFreehandROITool.toolName, {
  smoothing: { smoothOnAdd: false, smoothOnEdit: true  },
});

Read more in the Docs section of the website.

Extends

PlanarFreehandROITool

Constructors

new PlanarFreehandContourSegmentationTool()

new PlanarFreehandContourSegmentationTool(toolProps): PlanarFreehandContourSegmentationTool

Parameters

• toolProps: PublicToolProps

Properties

_throttledCalculateCachedStats

_throttledCalculateCachedStats: Function

Inherited from

PlanarFreehandROITool._throttledCalculateCachedStats

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:118

activateDraw()

protected activateDraw: (evt, annotation, viewportIdsToRender) => void

Parameters

• evt: InteractionEventType

• annotation: PlanarFreehandROIAnnotation

tools/src/tools/annotation/PlanarFreehandROITool.ts:122

mode

mode: ToolModes

Tool Mode - Active/Passive/Enabled/Disabled/

Inherited from

PlanarFreehandROITool.mode

Defined in

tools/src/tools/base/BaseTool.ts:21

supportedInteractionTypes

supportedInteractionTypes: InteractionTypes[]

Supported Interaction Types - currently only Mouse

Inherited from

PlanarFreehandROITool.supportedInteractionTypes

Defined in

tools/src/tools/base/BaseTool.ts:15

toolGroupId

toolGroupId: string

ToolGroup ID the tool instance belongs to

Inherited from

PlanarFreehandROITool.toolGroupId

Defined in

tools/src/tools/base/BaseTool.ts:19

toolName

static toolName: any

Overrides

PlanarFreehandROITool.toolName

Defined in

tools/src/tools/annotation/PlanarFreehandContourSegmentationTool.ts:8

Methods

_calculateStatsIfActive()

_calculateStatsIfActive(annotation, targetId, viewport, renderingEngine, enabledElement): void

Parameters

• annotation: PlanarFreehandROIAnnotation

• targetId: string

• viewport: any

• renderingEngine: any

• enabledElement: any

Returns

void

Inherited from

PlanarFreehandROITool._calculateStatsIfActive

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:663

addAnnotation()

protected addAnnotation(annotation, element): string

Add the annotation to the annotation manager.

Parameters

• annotation: Annotation

Contour annotation that is being added

• element: HTMLDivElement

HTMLDivElement

Returns

string

Inherited from

PlanarFreehandROITool.addAnnotation

Defined in

tools/src/tools/base/ContourSegmentationBaseTool.ts:106

addNewAnnotation()

addNewAnnotation(evt): PlanarFreehandROIAnnotation

Based on the current position of the mouse and the current image, creates a PlanarFreehandROIAnnotation and stores it in the annotationManager.

Parameters

• evt: InteractionEventType

EventTypes.NormalizedMouseEventType

Returns

PlanarFreehandROIAnnotation

The PlanarFreehandROIAnnotation object.

Inherited from

PlanarFreehandROITool.addNewAnnotation

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:282

applyActiveStrategy()

applyActiveStrategy(enabledElement, operationData): any

Applies the active strategy function to the enabled element with the specified operation data.

Parameters

• enabledElement: IEnabledElement

The element that is being operated on.

• operationData: unknown

The data that needs to be passed to the strategy.

Returns

any

The result of the strategy.

Inherited from

PlanarFreehandROITool.applyActiveStrategy

Defined in

tools/src/tools/base/BaseTool.ts:62

applyActiveStrategyCallback()

applyActiveStrategyCallback(enabledElement, operationData, callbackType): any

Applies the active strategy, with a given event type being applied. The event type function is found by indexing it on the active strategy function.

Parameters

• enabledElement: IEnabledElement

The element that is being operated on.

• operationData: unknown

The data that needs to be passed to the strategy.

• callbackType: string

the type of the callback

Returns

any

The result of the strategy.

Inherited from

PlanarFreehandROITool.applyActiveStrategyCallback

Defined in

tools/src/tools/base/BaseTool.ts:86

cancel()

cancel(element): void

Parameters

• element: HTMLDivElement

Returns

void

Inherited from

PlanarFreehandROITool.cancel

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:412

cancelAnnotation()

protected cancelAnnotation(annotation): void

Unregister the segmentation when the annotation is canceled

Parameters

• annotation: Annotation

Contour segmentation annotation

Returns

void

Inherited from

PlanarFreehandROITool.cancelAnnotation

Defined in

tools/src/tools/base/ContourSegmentationBaseTool.ts:124

createAnnotation()

protected createAnnotation(evt): Annotation

Parameters

• evt: InteractionEventType

Returns

Annotation

Inherited from

PlanarFreehandROITool.createAnnotation

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:537

filterInteractableAnnotationsForElement()

filterInteractableAnnotationsForElement(element, annotations): Annotations

We need to override this method as the tool doesn't always have handles, which means filterAnnotationsForDisplay fails inside filterAnnotationsWithinSlice.

Parameters

• element: HTMLDivElement

• annotations: Annotations

Returns

Annotations

Inherited from

PlanarFreehandROITool.filterInteractableAnnotationsForElement

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:431

getAnnotationStyle()

protected getAnnotationStyle(context): any

Get the annotation style that may or may not be merged with segmentation style so that it can be used by ROI and contour segmentation annotations when rendered on a canvas or svg layer.

Segmentation style shall be a combination of four different configurations from different levels (global, toolGroup, segmentation and segment) and it shall not be used when isContourSegmentationTool() is overwritten and changed by a child class to return false when that class should work only as an ROI.

Parameters

• context: any

Returns

any

Inherited from

PlanarFreehandROITool.getAnnotationStyle

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:563

getHandleNearImagePoint()

getHandleNearImagePoint(element, annotation, canvasCoords, proximity): ToolHandle

It checks if the mouse click is near TextBoxHandle or AnnotationHandle itself, and return either it. It prioritize TextBoxHandle over AnnotationHandle. If the mouse click is not near any of the handles, it does not return anything.

Parameters

• element: HTMLDivElement

The element that the tool is attached to.

• annotation: Annotation

The annotation object associated with the annotation

• canvasCoords: Point2

The coordinates of the mouse click on canvas

• proximity: number

The distance from the mouse cursor to the point that is considered "near".

Returns

ToolHandle

The handle that is closest to the cursor, or null if the cursor is not near any of the handles.

Inherited from

PlanarFreehandROITool.getHandleNearImagePoint

Defined in

tools/src/tools/base/AnnotationTool.ts:262

getLinkedTextBoxStyle()

getLinkedTextBoxStyle(specifications, annotation?): Record<string, unknown>

It returns the style for the text box

Parameters

• specifications: StyleSpecifier

• annotation?: Annotation

The annotation for the tool that is currently active.

Returns

Record<string, unknown>

An object of the style settings for the text box.

Inherited from

PlanarFreehandROITool.getLinkedTextBoxStyle

Defined in

tools/src/tools/base/AnnotationTool.ts:328

getPolylinePoints()

protected getPolylinePoints(annotation): Point3[]

Get polyline points in world space. Just to give a chance for child classes to override it.

Parameters

• annotation: ContourAnnotation

Contour annotation

Returns

Point3[]

Polyline points in world space

Inherited from

PlanarFreehandROITool.getPolylinePoints

Defined in

tools/src/tools/base/ContourBaseTool.ts:245

getReferencedImageId()

protected getReferencedImageId(viewport, worldPos, viewPlaneNormal, viewUp?): string

Parameters

• viewport: Viewport

• worldPos: Point3

• viewPlaneNormal: Point3

• viewUp?: Point3

Returns

string

Inherited from

PlanarFreehandROITool.getReferencedImageId

Defined in

tools/src/tools/base/AnnotationDisplayTool.ts:126

getStyle()

getStyle(property, specifications, annotation?): unknown

It takes the property (color, lineDash, etc.) and based on the state of the annotation (selected, highlighted etc.) it returns the appropriate value based on the central toolStyle settings for each level of specification.

Parameters

• property: string

The name of the style property to get.

• specifications: StyleSpecifier

• annotation?: Annotation

The annotation for the tool that is currently active.

Returns

unknown

The value of the property.

Inherited from

PlanarFreehandROITool.getStyle

Defined in

tools/src/tools/base/AnnotationDisplayTool.ts:163

getTargetId()

protected getTargetId(viewport): string

Get the target Id for the viewport which will be used to store the cached statistics scoped to that target in the annotations. For StackViewport, targetId is the viewportId, but for the volume viewport, the targetId will be grabbed from the volumeId if particularly specified in the tool configuration, or if not, the first actorUID in the viewport.

Parameters

• viewport: Viewport

viewport to get the targetId for

Returns

string

targetId

Inherited from

PlanarFreehandROITool.getTargetId

Defined in

tools/src/tools/base/BaseTool.ts:197

getTargetImageData()

protected getTargetImageData(targetId): IImageData | CPUIImageData

Get the image that is displayed for the targetId in the cachedStats which can be

imageId:<imageId>
volumeId:<volumeId>
videoId:<basePathForVideo>/frames/<frameSpecifier>

Parameters

• targetId: string

annotation targetId stored in the cached stats

Returns

IImageData | CPUIImageData

The image data for the target.

Inherited from

PlanarFreehandROITool.getTargetImageData

Defined in

tools/src/tools/base/BaseTool.ts:140

getToolName()

getToolName(): string

Returns the name of the tool

Returns

string

The name of the tool.

Inherited from

PlanarFreehandROITool.getToolName

Defined in

tools/src/tools/base/BaseTool.ts:50

handleSelectedCallback()

handleSelectedCallback(evt, annotation, handle): void

Begins an edit of an open contour, when the mouse has selected a handle (end) of the open contour.

Parameters

• evt: InteractionEventType

EventTypes.MouseDownEventType

• annotation: PlanarFreehandROIAnnotation

PlanarFreehandROIAnnotation annotation.

• handle: ToolHandle

The handle index, 0 for the start and 1 for the end.

Returns

void

Inherited from

PlanarFreehandROITool.handleSelectedCallback

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:317

isContourSegmentationTool()

protected isContourSegmentationTool(): boolean

Allow children classes inherit from this one and disable contour segmentation behavior and children classes shall work like a normal contour instance which is useful for "hybrid" classes such as splineROI/splineSeg, livewire/livewireSeg, freehandROI/freehandSeg. When this method returns false:

contour segmentation data is not added to new annotations
annotations are not registered/unregistered as segmentations
annotation style shall not contain any segmentation style

Returns

boolean

True if it is a contour segmentation class or false otherwise

Overrides

PlanarFreehandROITool.isContourSegmentationTool

Defined in

tools/src/tools/annotation/PlanarFreehandContourSegmentationTool.ts:29

isPointNearTool()

isPointNearTool(element, annotation, canvasCoords, proximity): boolean

Returns if the canvas point is near the line of the given annotation in the provided element or not. A proximity is passed to the function to determine the proximity of the point to the annotation in number of pixels.

Parameters

• element: HTMLDivElement

HTML Element

• annotation: PlanarFreehandROIAnnotation

The PlanarFreehandROIAnnotation.

• canvasCoords: Point2

Canvas coordinates

• proximity: number

Proximity to tool to consider

Returns

boolean

Boolean, whether the canvas point is near tool

Inherited from

PlanarFreehandROITool.isPointNearTool

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:373

isSuvScaled()

isSuvScaled(viewport, targetId, imageId?): boolean

Returns true if the viewport is scaled to SUV units

Parameters

• viewport: StackViewport | VolumeViewport

The viewport

• targetId: string

The annotation targetId

• imageId?: string

The annotation imageId

Returns

boolean

Inherited from

PlanarFreehandROITool.isSuvScaled

Defined in

tools/src/tools/base/AnnotationTool.ts:374

mouseMoveCallback()

mouseMoveCallback(evt, filteredAnnotations?): boolean

Event handler for Cornerstone MOUSE_MOVE event.

Parameters

• evt: MouseMoveEventType

The normalized mouse event

• filteredAnnotations?: Annotations

The annotations to check for hover interactions

Returns

boolean

True if the annotation needs to be re-drawn by the annotationRenderingEngine.

Inherited from

PlanarFreehandROITool.mouseMoveCallback

Defined in

tools/src/tools/base/AnnotationTool.ts:197

moveAnnotation()

protected moveAnnotation(annotation, worldPosDelta): void

Move an annotation and all its child annotations in a recursive way.

That is useful when clicking on a spline contour to completely translate it to a different place. In that case all holes (child annotations) must also be translated too.

Parameters

• annotation: Annotation

Annotation

• worldPosDelta: Point3

Delta in world space

Returns

void

Inherited from

PlanarFreehandROITool.moveAnnotation

Defined in

tools/src/tools/base/ContourBaseTool.ts:192

onImageSpacingCalibrated()

onImageSpacingCalibrated(evt): void

On Image Calibration, take all the annotation from the AnnotationState manager, and invalidate them to force them to be re-rendered and their stats to be recalculated. Then use the old and new imageData (non-calibrated and calibrated) to calculate the new position for the annotations in the space of the new imageData.

Parameters

• evt: ImageSpacingCalibratedEvent

The calibration event

Returns

void

Inherited from

PlanarFreehandROITool.onImageSpacingCalibrated

Defined in

tools/src/tools/base/AnnotationDisplayTool.ts:83

renderAnnotation()

renderAnnotation(enabledElement, svgDrawingHelper): boolean

it is used to draw the annotation in each request animation frame. It calculates the updated cached statistics if data is invalidated and cache it.

Parameters

• enabledElement: IEnabledElement

The Cornerstone's enabledElement.

• svgDrawingHelper: SVGDrawingHelper

The svgDrawingHelper providing the context for drawing.

Returns

boolean

Inherited from

PlanarFreehandROITool.renderAnnotation

Defined in

tools/src/tools/base/ContourBaseTool.ts:39

renderAnnotationInstance()

protected renderAnnotationInstance(renderContext): boolean

Parameters

• renderContext: AnnotationRenderContext

Returns

boolean

Overrides

PlanarFreehandROITool.renderAnnotationInstance

Defined in

tools/src/tools/annotation/PlanarFreehandContourSegmentationTool.ts:34

setActiveStrategy()

setActiveStrategy(strategyName): void

Sets the active strategy for a tool. Strategies are multiple implementations of tool behavior that can be switched by tool configuration.

Parameters

• strategyName: string

name of the strategy to be set as active

Returns

void

Inherited from

PlanarFreehandROITool.setActiveStrategy

Defined in

tools/src/tools/base/BaseTool.ts:126

setConfiguration()

setConfiguration(newConfiguration): void

merges the new configuration with the tool configuration

Parameters

• newConfiguration: Record<string, any>

Returns

void

Inherited from

PlanarFreehandROITool.setConfiguration

Defined in

tools/src/tools/base/BaseTool.ts:112

toolSelectedCallback()

toolSelectedCallback(evt, annotation): void

Edits the open or closed contour when the line is grabbed and dragged.

Parameters

• evt: InteractionEventType

• annotation: PlanarFreehandROIAnnotation

Returns

void

Inherited from

PlanarFreehandROITool.toolSelectedCallback

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:341

updateClosedCachedStats()

protected updateClosedCachedStats(__namedParameters): void

Parameters

• __namedParameters

• __namedParameters.cachedStats: any

• __namedParameters.calibratedScale: any

• __namedParameters.canvasCoordinates: any

• __namedParameters.imageData: any

• __namedParameters.metadata: any

• __namedParameters.modalityUnit: any

• __namedParameters.points: any

• __namedParameters.targetId: any

• __namedParameters.viewport: any

Returns

void

Inherited from

PlanarFreehandROITool.updateClosedCachedStats

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:822

updateContourPolyline()

protected updateContourPolyline(annotation, polylineData, transforms, options?): void

Parameters

• annotation: ContourAnnotation

• polylineData

• polylineData.closed?: boolean

• polylineData.points: Point2[]

• polylineData.targetWindingDirection?: ContourWindingDirection

• transforms?

• transforms.canvasToWorld?

• transforms.worldToCanvas?

• options?

• options.updateWindingDirection?: boolean

Returns

void

Inherited from

PlanarFreehandROITool.updateContourPolyline

Defined in

tools/src/tools/base/ContourBaseTool.ts:213

updateOpenCachedStats()

protected updateOpenCachedStats(__namedParameters): void

Parameters

• __namedParameters

• __namedParameters.cachedStats: any

• __namedParameters.calibratedScale: any

• __namedParameters.canvasCoordinates: any

• __namedParameters.metadata: any

• __namedParameters.modalityUnit: any

• __namedParameters.targetId: any

Returns

void

Inherited from

PlanarFreehandROITool.updateOpenCachedStats

Defined in

tools/src/tools/annotation/PlanarFreehandROITool.ts:977

createAndAddAnnotation()

static createAndAddAnnotation(viewport, ...annotationBaseData): void

Creates and adds an annotation of the given type, firing the annotation modified event on the new annotation. This implicitly uses the static class when you call it on the correct base class. For example, you can call the KeyImageTool.createAnnotation method on KeyImageTool.toolName by calling KeyImageTool.createAndAddAnnotation

Parameters

• viewport: any

• ...annotationBaseData: any[]

Returns

void

Inherited from

PlanarFreehandROITool.createAndAddAnnotation

Defined in

tools/src/tools/base/AnnotationTool.ts:97

createAnnotation()

static createAnnotation(...annotationBaseData): Annotation

Creates a base annotation object, adding in any annotation base data provided

Parameters

• ...annotationBaseData: any[]

Returns

Annotation

Inherited from

PlanarFreehandROITool.createAnnotation

Defined in

tools/src/tools/base/AnnotationTool.ts:45

createAnnotationForViewport()

static createAnnotationForViewport(viewport, ...annotationBaseData): Annotation

Creates a new annotation for the given viewport. This just adds the viewport reference data to the metadata, and otherwise returns the static class createAnnotation data.

Parameters

• viewport: any

• ...annotationBaseData: any[]

Returns

Annotation

Inherited from

PlanarFreehandROITool.createAnnotationForViewport

Defined in

tools/src/tools/base/AnnotationTool.ts:82

Extends​

Constructors​

new PlanarFreehandContourSegmentationTool()​

Parameters​

Returns​

Overrides​

Defined in​

Properties​

_throttledCalculateCachedStats​

Inherited from​

Defined in​

activateDraw()​

Parameters​

Returns​

Inherited from​

Defined in​

configuration​

Inherited from​

Defined in​

isDrawing​

Inherited from​

Defined in​

isEditingClosed​

Inherited from​

Defined in​

isEditingOpen​

Inherited from​

Defined in​

mode​

Inherited from​

Defined in​

supportedInteractionTypes​

Inherited from​

Defined in​

toolGroupId​

Inherited from​

Defined in​

toolName​

Overrides​

Defined in​

Methods​

_calculateStatsIfActive()​

Parameters​

Returns​

Inherited from​

Defined in​

addAnnotation()​

Parameters​

Returns​

Inherited from​

Defined in​

addNewAnnotation()​

Parameters​

Returns​

Inherited from​

Defined in​

applyActiveStrategy()​

Parameters​

Returns​

Inherited from​

Defined in​

applyActiveStrategyCallback()​

Parameters​

Returns​

Inherited from​

Defined in​

cancel()​

Parameters​

Returns​

Inherited from​

Defined in​

cancelAnnotation()​

Parameters​

Returns​

Inherited from​

Defined in​

createAnnotation()​

Parameters​

Returns​

Inherited from​

Extends

Constructors

new PlanarFreehandContourSegmentationTool()

Parameters

Returns

Overrides

Defined in

Properties

_throttledCalculateCachedStats

Inherited from

Defined in

activateDraw()

Parameters

Returns

Inherited from

Defined in

configuration

Inherited from

Defined in

isDrawing

Inherited from

Defined in

isEditingClosed

Inherited from

Defined in

isEditingOpen

Inherited from

Defined in

mode

Inherited from

Defined in

supportedInteractionTypes

Inherited from

Defined in

toolGroupId

Inherited from

Defined in

toolName

Overrides

Defined in

Methods

_calculateStatsIfActive()

Parameters

Returns

Inherited from

Defined in

addAnnotation()

Parameters

Returns

Inherited from

Defined in

addNewAnnotation()

Parameters

Returns

Inherited from

Defined in

applyActiveStrategy()

Parameters

Returns

Inherited from

Defined in

applyActiveStrategyCallback()

Parameters

Returns

Inherited from

Defined in

cancel()

Parameters

Returns

Inherited from

Defined in

cancelAnnotation()

Parameters

Returns

Inherited from

Defined in

createAnnotation()

Parameters

Returns

Inherited from