wadouri combineFrameInstanceDataset.ts

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  function getDirectFrameInformation(dataSet, frame) {
  if (!dataSet) {
    return;
  }
 
  const {
    NumberOfFrames,
    PerFrameFunctionalGroupsSequence,
    SharedFunctionalGroupsSequence,
  } = getMultiframeInformation(dataSet);
 
  if (PerFrameFunctionalGroupsSequence || NumberOfFrames > 1) {
    const { shared, perFrame } = getFrameInformation(
      PerFrameFunctionalGroupsSequence,
      SharedFunctionalGroupsSequence,
      frame
    );
 
    return {
      NumberOfFrames,
      PerFrameFunctionalInformation: perFrame,
      SharedFunctionalInformation: shared,
    };
  }
 
  return {
    NumberOfFrames,
  };
}
 
function getFrameInformation(
  PerFrameFunctionalGroupsSequence,
  SharedFunctionalGroupsSequence,
  frameNumber
) {
  const shared = {};
 
  (SharedFunctionalGroupsSequence
    ? Object.values(SharedFunctionalGroupsSequence.items[0].dataSet.elements)
    : []
  )
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    .map((it: any) => (shared[it.tag] = it));
 
  const perFrame = {};
 
  (PerFrameFunctionalGroupsSequence
    ? Object.values(
        PerFrameFunctionalGroupsSequence.items[frameNumber - 1].dataSet.elements
      )
    : []
  )
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    .map((it: any) => (perFrame[it.tag] = it));
 
  return {
    shared,
    perFrame,
  };
}
 
function getMultiframeInformation(dataSet) {
  if (!dataSet) {
    return;
  }
  const { elements, ...otherAttributtes } = dataSet;
  const {
    x52009230: PerFrameFunctionalGroupsSequence,
    x52009229: SharedFunctionalGroupsSequence,
    ...otherElements
  } = elements;
 
  const NumberOfFrames = dataSet.intString('x00280008');
 
  return {
    NumberOfFrames,
    PerFrameFunctionalGroupsSequence,
    SharedFunctionalGroupsSequence,
    otherElements,
    otherAttributtes,
  };
}
 
// function that retrieves specific frame metadata information from multiframe
// metadata
function combineFrameInstanceDataset(frameNumber, dataSet) {
  if (!dataSet) {
    return;
  }
 
  const {
    NumberOfFrames,
    PerFrameFunctionalGroupsSequence,
    SharedFunctionalGroupsSequence,
    otherElements,
  } = getMultiframeInformation(dataSet);
 
  if (PerFrameFunctionalGroupsSequence || NumberOfFrames > 1) {
    const { shared, perFrame } = getFrameInformation(
      PerFrameFunctionalGroupsSequence,
      SharedFunctionalGroupsSequence,
      frameNumber
    );
 
    // creating a new copy of the dataset to remove the two multiframe dicom tags
    const newElements = {
      elements: {
        ...otherElements,
        ...shared,
        ...perFrame,
      },
    };
 
    const clonedDataset = Object.create(dataSet);
    const newDataset = Object.assign(clonedDataset, newElements);
 
    return newDataset;
  }
 
  return dataSet;
}
 
export {
  combineFrameInstanceDataset,
  getMultiframeInformation,
  getFrameInformation,
  getDirectFrameInformation,
};