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import i18n from '@ohif/i18n';
import { Enums as CSExtensionEnums } from '@ohif/extension-cornerstone';
import { adaptersSR } from '@cornerstonejs/adapters';
import addSRAnnotation from './utils/addSRAnnotation';
import isRehydratable from './utils/isRehydratable';
import {
SOPClassHandlerName,
SOPClassHandlerId,
SOPClassHandlerId3D,
SOPClassHandlerName3D,
} from './id';
import { CodeNameCodeSequenceValues, CodingSchemeDesignators } from './enums';
const { sopClassDictionary } = utils;
const { CORNERSTONE_3D_TOOLS_SOURCE_NAME, CORNERSTONE_3D_TOOLS_SOURCE_VERSION } = CSExtensionEnums;
const { ImageSet, MetadataProvider: metadataProvider } = classes;
const { CodeScheme: Cornerstone3DCodeScheme } = adaptersSR.Cornerstone3D;
type InstanceMetadata = Types.InstanceMetadata;
/**
* TODO
* - [ ] Add SR thumbnail
* - [ ] Make viewport
* - [ ] Get stacks from referenced displayInstanceUID and load into wrapped CornerStone viewport
*/
const sopClassUids = [
sopClassDictionary.BasicTextSR,
sopClassDictionary.EnhancedSR,
sopClassDictionary.ComprehensiveSR,
];
const validateSameStudyUID = (uid: string, instances): void => {
instances.forEach(it => {
Iif (it.StudyInstanceUID !== uid) {
console.warn('Not all instances have the same UID', uid, it);
throw new Error(`Instances ${it.SOPInstanceUID} does not belong to ${uid}`);
}
});
};
/**
* Adds instances to the DICOM SR series, rather than creating a new
* series, so that as SR's are saved, they append to the series, and the
* key image display set gets updated as well, containing just the new series.
* @param instances is a list of instances from THIS series that are not
* in this DICOM SR Display Set already.
*/
function addInstances(instances: InstanceMetadata[], displaySetService: DisplaySetService) {
this.instances.push(...instances);
utils.sortStudyInstances(this.instances);
// The last instance is the newest one, so is the one most interesting.
// Eventually, the SR viewer should have the ability to choose which SR
// gets loaded, and to navigate among them.
this.instance = this.instances[this.instances.length - 1];
this.isLoaded = false;
return this;
}
/**
* DICOM SR SOP Class Handler
* For all referenced images in the TID 1500/300 sections, add an image to the
* display.
* @param instances is a set of instances all from the same series
* @param servicesManager is the services that can be used for creating
* @returns The list of display sets created for the given instances object
*/
function _getDisplaySetsFromSeries(
instances,
servicesManager: AppTypes.ServicesManager,
extensionManager
) {
// If the series has no instances, stop here
Iif (!instances || !instances.length) {
throw new Error('No instances were provided');
}
utils.sortStudyInstances(instances);
// The last instance is the newest one, so is the one most interesting.
// Eventually, the SR viewer should have the ability to choose which SR
// gets loaded, and to navigate among them.
const instance = instances[instances.length - 1];
const {
StudyInstanceUID,
SeriesInstanceUID,
SOPInstanceUID,
SeriesDescription,
SeriesNumber,
SeriesDate,
SeriesTime,
ConceptNameCodeSequence,
SOPClassUID,
} = instance;
validateSameStudyUID(instance.StudyInstanceUID, instances);
const is3DSR = SOPClassUID === sopClassDictionary.Comprehensive3DSR;
const isImagingMeasurementReport =
ConceptNameCodeSequence?.CodeValue === CodeNameCodeSequenceValues.ImagingMeasurementReport;
const displaySet = {
Modality: 'SR',
displaySetInstanceUID: utils.guid(),
SeriesDescription,
SeriesNumber,
SeriesDate,
SeriesTime,
SOPInstanceUID,
SeriesInstanceUID,
StudyInstanceUID,
SOPClassHandlerId: is3DSR ? SOPClassHandlerId3D : SOPClassHandlerId,
SOPClassUID,
instances,
referencedImages: null,
measurements: null,
isDerivedDisplaySet: true,
isLoaded: false,
isImagingMeasurementReport,
sopClassUids,
instance,
addInstances,
label: SeriesDescription || `${i18n.t('Series')} ${SeriesNumber} - ${i18n.t('SR')}`,
};
displaySet.load = () => _load(displaySet, servicesManager, extensionManager);
return [displaySet];
}
/**
* Loads the display set with the given services and extension manager.
* @param srDisplaySet - The display set to load.
* @param servicesManager - The services manager containing displaySetService and measurementService.
* @param extensionManager - The extension manager containing data sources.
*/
async function _load(
srDisplaySet: Types.DisplaySet,
servicesManager: AppTypes.ServicesManager,
extensionManager: AppTypes.ExtensionManager
) {
const { displaySetService, measurementService } = servicesManager.services;
const dataSources = extensionManager.getDataSources();
const dataSource = dataSources[0];
const { ContentSequence } = srDisplaySet.instance;
async function retrieveBulkData(obj, parentObj = null, key = null) {
for (const prop in obj) {
if (typeof obj[prop] === 'object' && obj[prop] !== null) {
await retrieveBulkData(obj[prop], obj, prop);
} else Iif (Array.isArray(obj[prop])) {
await Promise.all(obj[prop].map(item => retrieveBulkData(item, obj, prop)));
} else Iif (prop === 'BulkDataURI') {
const value = await dataSource.retrieve.bulkDataURI({
BulkDataURI: obj[prop],
StudyInstanceUID: srDisplaySet.instance.StudyInstanceUID,
SeriesInstanceUID: srDisplaySet.instance.SeriesInstanceUID,
SOPInstanceUID: srDisplaySet.instance.SOPInstanceUID,
});
Iif (parentObj && key) {
parentObj[key] = new Float32Array(value);
}
}
}
}
if (srDisplaySet.isLoaded !== true) {
await retrieveBulkData(ContentSequence);
}
if (srDisplaySet.isImagingMeasurementReport) {
srDisplaySet.referencedImages = _getReferencedImagesList(ContentSequence);
srDisplaySet.measurements = _getMeasurements(ContentSequence);
} else E{
srDisplaySet.referencedImages = [];
srDisplaySet.measurements = [];
}
const mappings = measurementService.getSourceMappings(
CORNERSTONE_3D_TOOLS_SOURCE_NAME,
CORNERSTONE_3D_TOOLS_SOURCE_VERSION
);
srDisplaySet.isHydrated = false;
srDisplaySet.isRehydratable = isRehydratable(srDisplaySet, mappings);
srDisplaySet.isLoaded = true;
/** Check currently added displaySets and add measurements if the sources exist */
displaySetService.activeDisplaySets.forEach(activeDisplaySet => {
_checkIfCanAddMeasurementsToDisplaySet(
srDisplaySet,
activeDisplaySet,
dataSource,
servicesManager
);
});
/** Subscribe to new displaySets as the source may come in after */
displaySetService.subscribe(displaySetService.EVENTS.DISPLAY_SETS_ADDED, data => {
const { displaySetsAdded } = data;
/**
* If there are still some measurements that have not yet been loaded into cornerstone,
* See if we can load them onto any of the new displaySets.
*/
displaySetsAdded.forEach(newDisplaySet => {
_checkIfCanAddMeasurementsToDisplaySet(
srDisplaySet,
newDisplaySet,
dataSource,
servicesManager
);
});
});
}
/**
* Checks if measurements can be added to a display set.
*
* @param srDisplaySet - The source display set containing measurements.
* @param newDisplaySet - The new display set to check if measurements can be added.
* @param dataSource - The data source used to retrieve image IDs.
* @param servicesManager - The services manager.
*/
function _checkIfCanAddMeasurementsToDisplaySet(
srDisplaySet,
newDisplaySet,
dataSource,
servicesManager: AppTypes.ServicesManager
) {
const { customizationService } = servicesManager.services;
const unloadedMeasurements = srDisplaySet.measurements.filter(
measurement => measurement.loaded === false
);
if (
unloadedMeasurements.length === 0 ||
!(newDisplaySet instanceof ImageSet) ||
newDisplaySet.unsupported
) {
return;
}
// const { sopClassUids } = newDisplaySet;
// Create a Set for faster lookups
// const sopClassUidSet = new Set(sopClassUids);
// Create a Map to efficiently look up ImageIds by SOPInstanceUID and frame number
const imageIdMap = new Map<string, string>();
const imageIds = dataSource.getImageIdsForDisplaySet(newDisplaySet);
for (const imageId of imageIds) {
const { SOPInstanceUID, frameNumber } = metadataProvider.getUIDsFromImageID(imageId);
const key = `${SOPInstanceUID}:${frameNumber || 1}`;
imageIdMap.set(key, imageId);
}
Iif (!unloadedMeasurements?.length) {
return;
}
const is3DSR = srDisplaySet.SOPClassUID === sopClassDictionary.Comprehensive3DSR;
for (let j = unloadedMeasurements.length - 1; j >= 0; j--) {
let measurement = unloadedMeasurements[j];
const onBeforeSRAddMeasurement = customizationService.getCustomization(
'onBeforeSRAddMeasurement'
);
if (typeof onBeforeSRAddMeasurement === 'function') {
measurement = onBeforeSRAddMeasurement({
measurement,
StudyInstanceUID: srDisplaySet.StudyInstanceUID,
SeriesInstanceUID: srDisplaySet.SeriesInstanceUID,
});
}
// if it is 3d SR we can just add the SR annotation
Iif (is3DSR) {
addSRAnnotation(measurement, null, null);
measurement.loaded = true;
continue;
}
const referencedSOPSequence = measurement.coords[0].ReferencedSOPSequence;
Iif (!referencedSOPSequence) {
continue;
}
const { ReferencedSOPInstanceUID } = referencedSOPSequence;
const frame = referencedSOPSequence.ReferencedFrameNumber || 1;
const key = `${ReferencedSOPInstanceUID}:${frame}`;
const imageId = imageIdMap.get(key);
if (
imageId &&
_measurementReferencesSOPInstanceUID(measurement, ReferencedSOPInstanceUID, frame)
) {
addSRAnnotation(measurement, imageId, frame);
// Update measurement properties
measurement.loaded = true;
measurement.imageId = imageId;
measurement.displaySetInstanceUID = newDisplaySet.displaySetInstanceUID;
measurement.ReferencedSOPInstanceUID = ReferencedSOPInstanceUID;
measurement.frameNumber = frame;
unloadedMeasurements.splice(j, 1);
}
}
}
/**
* Checks if a measurement references a specific SOP Instance UID.
* @param measurement - The measurement object.
* @param SOPInstanceUID - The SOP Instance UID to check against.
* @param frameNumber - The frame number to check against (optional).
* @returns True if the measurement references the specified SOP Instance UID, false otherwise.
*/
function _measurementReferencesSOPInstanceUID(measurement, SOPInstanceUID, frameNumber) {
const { coords } = measurement;
/**
* NOTE: The ReferencedFrameNumber can be multiple values according to the DICOM
* Standard. But for now, we will support only one ReferenceFrameNumber.
*/
const ReferencedFrameNumber =
(measurement.coords[0].ReferencedSOPSequence &&
measurement.coords[0].ReferencedSOPSequence?.ReferencedFrameNumber) ||
1;
Iif (frameNumber && Number(frameNumber) !== Number(ReferencedFrameNumber)) {
return false;
}
for (let j = 0; j < coords.length; j++) {
const coord = coords[j];
const { ReferencedSOPInstanceUID } = coord.ReferencedSOPSequence;
if (ReferencedSOPInstanceUID === SOPInstanceUID) {
return true;
}
}
return false;
}
/**
* Retrieves the SOP class handler module.
*
* @param {Object} options - The options for retrieving the SOP class handler module.
* @param {Object} options.servicesManager - The services manager.
* @param {Object} options.extensionManager - The extension manager.
* @returns {Array} An array containing the SOP class handler module.
*/
function getSopClassHandlerModule(params: OhifTypes.Extensions.ExtensionParams) {
const { servicesManager, extensionManager } = params;
const getDisplaySetsFromSeries = instances => {
return _getDisplaySetsFromSeries(instances, servicesManager, extensionManager);
};
return [
{
name: SOPClassHandlerName,
sopClassUids,
getDisplaySetsFromSeries,
},
{
name: SOPClassHandlerName3D,
sopClassUids: [sopClassDictionary.Comprehensive3DSR],
getDisplaySetsFromSeries,
},
];
}
/**
* Retrieves the measurements from the ImagingMeasurementReportContentSequence.
*
* @param {Array} ImagingMeasurementReportContentSequence - The ImagingMeasurementReportContentSequence array.
* @returns {Array} - The array of measurements.
*/
function _getMeasurements(ImagingMeasurementReportContentSequence) {
const ImagingMeasurements = ImagingMeasurementReportContentSequence.find(
item =>
item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.ImagingMeasurements
);
Iif (!ImagingMeasurements) {
return [];
}
const MeasurementGroups = _getSequenceAsArray(ImagingMeasurements.ContentSequence).filter(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.MeasurementGroup
);
const mergedContentSequencesByTrackingUniqueIdentifiers =
_getMergedContentSequencesByTrackingUniqueIdentifiers(MeasurementGroups);
const measurements = [];
Object.keys(mergedContentSequencesByTrackingUniqueIdentifiers).forEach(
trackingUniqueIdentifier => {
const mergedContentSequence =
mergedContentSequencesByTrackingUniqueIdentifiers[trackingUniqueIdentifier];
const measurement = _processMeasurement(mergedContentSequence);
if (measurement) {
measurements.push(measurement);
}
}
);
return measurements;
}
/**
* Retrieves merged content sequences by tracking unique identifiers.
*
* @param {Array} MeasurementGroups - The measurement groups.
* @returns {Object} - The merged content sequences by tracking unique identifiers.
*/
function _getMergedContentSequencesByTrackingUniqueIdentifiers(MeasurementGroups) {
const mergedContentSequencesByTrackingUniqueIdentifiers = {};
MeasurementGroups.forEach(MeasurementGroup => {
const ContentSequence = _getSequenceAsArray(MeasurementGroup.ContentSequence);
const TrackingUniqueIdentifierItem = ContentSequence.find(
item =>
item.ConceptNameCodeSequence.CodeValue ===
CodeNameCodeSequenceValues.TrackingUniqueIdentifier
);
Iif (!TrackingUniqueIdentifierItem) {
console.warn('No Tracking Unique Identifier, skipping ambiguous measurement.');
}
const trackingUniqueIdentifier = TrackingUniqueIdentifierItem.UID;
if (mergedContentSequencesByTrackingUniqueIdentifiers[trackingUniqueIdentifier] === undefined) {
// Add the full ContentSequence
mergedContentSequencesByTrackingUniqueIdentifiers[trackingUniqueIdentifier] = [
...ContentSequence,
];
} else E{
// Add the ContentSequence minus the tracking identifier, as we have this
// Information in the merged ContentSequence anyway.
ContentSequence.forEach(item => {
Iif (
item.ConceptNameCodeSequence.CodeValue !==
CodeNameCodeSequenceValues.TrackingUniqueIdentifier
) {
mergedContentSequencesByTrackingUniqueIdentifiers[trackingUniqueIdentifier].push(item);
}
});
}
});
return mergedContentSequencesByTrackingUniqueIdentifiers;
}
/**
* Processes the measurement based on the merged content sequence.
* If the merged content sequence contains SCOORD or SCOORD3D value types,
* it calls the _processTID1410Measurement function.
* Otherwise, it calls the _processNonGeometricallyDefinedMeasurement function.
*
* @param {Array<Object>} mergedContentSequence - The merged content sequence to process.
* @returns {any} - The processed measurement result.
*/
function _processMeasurement(mergedContentSequence) {
Iif (
mergedContentSequence.some(
group => group.ValueType === 'SCOORD' || group.ValueType === 'SCOORD3D'
)
) {
return _processTID1410Measurement(mergedContentSequence);
}
return _processNonGeometricallyDefinedMeasurement(mergedContentSequence);
}
/**
* Processes TID 1410 style measurements from the mergedContentSequence.
* TID 1410 style measurements have a SCOORD or SCOORD3D at the top level,
* and non-geometric representations where each NUM has "INFERRED FROM" SCOORD/SCOORD3D.
*
* @param mergedContentSequence - The merged content sequence containing the measurements.
* @returns The measurement object containing the loaded status, labels, coordinates, tracking unique identifier, and tracking identifier.
*/
function _processTID1410Measurement(mergedContentSequence) {
// Need to deal with TID 1410 style measurements, which will have a SCOORD or SCOORD3D at the top level,
// And non-geometric representations where each NUM has "INFERRED FROM" SCOORD/SCOORD3D
const graphicItem = mergedContentSequence.find(
group => group.ValueType === 'SCOORD' || group.ValueType === 'SCOORD3D'
);
const UIDREFContentItem = mergedContentSequence.find(group => group.ValueType === 'UIDREF');
const TrackingIdentifierContentItem = mergedContentSequence.find(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.TrackingIdentifier
);
Iif (!graphicItem) {
console.warn(
`graphic ValueType ${graphicItem.ValueType} not currently supported, skipping annotation.`
);
return;
}
const NUMContentItems = mergedContentSequence.filter(group => group.ValueType === 'NUM');
const measurement = {
loaded: false,
labels: [],
coords: [_getCoordsFromSCOORDOrSCOORD3D(graphicItem)],
TrackingUniqueIdentifier: UIDREFContentItem.UID,
TrackingIdentifier: TrackingIdentifierContentItem.TextValue,
};
NUMContentItems.forEach(item => {
const { ConceptNameCodeSequence, MeasuredValueSequence } = item;
Iif (MeasuredValueSequence) {
measurement.labels.push(
_getLabelFromMeasuredValueSequence(ConceptNameCodeSequence, MeasuredValueSequence)
);
}
});
const findingSites = mergedContentSequence.filter(
item =>
item.ConceptNameCodeSequence.CodingSchemeDesignator === CodingSchemeDesignators.SCT &&
item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.FindingSiteSCT
);
Iif (findingSites.length) {
measurement.labels.push({
label: CodeNameCodeSequenceValues.FindingSiteSCT,
value: findingSites[0].ConceptCodeSequence.CodeMeaning,
});
}
return measurement;
}
/**
* Processes the non-geometrically defined measurement from the merged content sequence.
*
* @param mergedContentSequence The merged content sequence containing the measurement data.
* @returns The processed measurement object.
*/
function _processNonGeometricallyDefinedMeasurement(mergedContentSequence) {
const NUMContentItems = mergedContentSequence.filter(group => group.ValueType === 'NUM');
const UIDREFContentItem = mergedContentSequence.find(group => group.ValueType === 'UIDREF');
const TrackingIdentifierContentItem = mergedContentSequence.find(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.TrackingIdentifier
);
const finding = mergedContentSequence.find(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.Finding
);
const findingSites = mergedContentSequence.filter(
item =>
item.ConceptNameCodeSequence.CodingSchemeDesignator === CodingSchemeDesignators.SRT &&
item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.FindingSite
);
const measurement = {
loaded: false,
labels: [],
coords: [],
TrackingUniqueIdentifier: UIDREFContentItem.UID,
TrackingIdentifier: TrackingIdentifierContentItem.TextValue,
};
Iif (
finding &&
CodingSchemeDesignators.CornerstoneCodeSchemes.includes(
finding.ConceptCodeSequence.CodingSchemeDesignator
) &&
finding.ConceptCodeSequence.CodeValue === Cornerstone3DCodeScheme.codeValues.CORNERSTONEFREETEXT
) {
measurement.labels.push({
label: Cornerstone3DCodeScheme.codeValues.CORNERSTONEFREETEXT,
value: finding.ConceptCodeSequence.CodeMeaning,
});
}
// TODO -> Eventually hopefully support SNOMED or some proper code library, just free text for now.
Iif (findingSites.length) {
const cornerstoneFreeTextFindingSite = findingSites.find(
FindingSite =>
CodingSchemeDesignators.CornerstoneCodeSchemes.includes(
FindingSite.ConceptCodeSequence.CodingSchemeDesignator
) &&
FindingSite.ConceptCodeSequence.CodeValue ===
Cornerstone3DCodeScheme.codeValues.CORNERSTONEFREETEXT
);
Iif (cornerstoneFreeTextFindingSite) {
measurement.labels.push({
label: Cornerstone3DCodeScheme.codeValues.CORNERSTONEFREETEXT,
value: cornerstoneFreeTextFindingSite.ConceptCodeSequence.CodeMeaning,
});
}
}
NUMContentItems.forEach(item => {
const { ConceptNameCodeSequence, ContentSequence, MeasuredValueSequence } = item;
const { ValueType } = ContentSequence;
Iif (!ValueType === 'SCOORD') {
console.warn(`Graphic ${ValueType} not currently supported, skipping annotation.`);
return;
}
const coords = _getCoordsFromSCOORDOrSCOORD3D(ContentSequence);
if (coords) {
measurement.coords.push(coords);
}
if (MeasuredValueSequence) {
measurement.labels.push(
_getLabelFromMeasuredValueSequence(ConceptNameCodeSequence, MeasuredValueSequence)
);
}
});
return measurement;
}
/**
* Extracts coordinates from a graphic item of type SCOORD or SCOORD3D.
* @param {object} graphicItem - The graphic item containing the coordinates.
* @returns {object} - The extracted coordinates.
*/
const _getCoordsFromSCOORDOrSCOORD3D = graphicItem => {
const { ValueType, GraphicType, GraphicData } = graphicItem;
const coords = { ValueType, GraphicType, GraphicData };
coords.ReferencedSOPSequence = graphicItem.ContentSequence?.ReferencedSOPSequence;
coords.ReferencedFrameOfReferenceSequence =
graphicItem.ReferencedFrameOfReferenceUID ||
graphicItem.ContentSequence?.ReferencedFrameOfReferenceSequence;
return coords;
};
/**
* Retrieves the label and value from the provided ConceptNameCodeSequence and MeasuredValueSequence.
* @param {Object} ConceptNameCodeSequence - The ConceptNameCodeSequence object.
* @param {Object} MeasuredValueSequence - The MeasuredValueSequence object.
* @returns {Object} - An object containing the label and value.
* The label represents the CodeMeaning from the ConceptNameCodeSequence.
* The value represents the formatted NumericValue and CodeValue from the MeasuredValueSequence.
* Example: { label: 'Long Axis', value: '31.00 mm' }
*/
function _getLabelFromMeasuredValueSequence(ConceptNameCodeSequence, MeasuredValueSequence) {
const { CodeMeaning } = ConceptNameCodeSequence;
const { NumericValue, MeasurementUnitsCodeSequence } = MeasuredValueSequence;
const { CodeValue } = MeasurementUnitsCodeSequence;
const formatedNumericValue = NumericValue ? Number(NumericValue).toFixed(2) : '';
return {
label: CodeMeaning,
value: `${formatedNumericValue} ${CodeValue}`,
}; // E.g. Long Axis: 31.0 mm
}
/**
* Retrieves a list of referenced images from the Imaging Measurement Report Content Sequence.
*
* @param {Array} ImagingMeasurementReportContentSequence - The Imaging Measurement Report Content Sequence.
* @returns {Array} - The list of referenced images.
*/
function _getReferencedImagesList(ImagingMeasurementReportContentSequence) {
const ImageLibrary = ImagingMeasurementReportContentSequence.find(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.ImageLibrary
);
Iif (!ImageLibrary) {
return [];
}
const ImageLibraryGroup = _getSequenceAsArray(ImageLibrary.ContentSequence).find(
item => item.ConceptNameCodeSequence.CodeValue === CodeNameCodeSequenceValues.ImageLibraryGroup
);
Iif (!ImageLibraryGroup) {
return [];
}
const referencedImages = [];
_getSequenceAsArray(ImageLibraryGroup.ContentSequence).forEach(item => {
const { ReferencedSOPSequence } = item;
Iif (!ReferencedSOPSequence) {
return;
}
for (const ref of _getSequenceAsArray(ReferencedSOPSequence)) {
if (ref.ReferencedSOPClassUID) {
const { ReferencedSOPClassUID, ReferencedSOPInstanceUID } = ref;
referencedImages.push({
ReferencedSOPClassUID,
ReferencedSOPInstanceUID,
});
}
}
});
return referencedImages;
}
/**
* Converts a DICOM sequence to an array.
* If the sequence is null or undefined, an empty array is returned.
* If the sequence is already an array, it is returned as is.
* Otherwise, the sequence is wrapped in an array and returned.
*
* @param {any} sequence - The DICOM sequence to convert.
* @returns {any[]} - The converted array.
*/
function _getSequenceAsArray(sequence) {
Iif (!sequence) {
return [];
}
return Array.isArray(sequence) ? sequence : [sequence];
}
export default getSopClassHandlerModule;
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