How can I modify a segmentation(annotation) in code?

Support Development
1

I wanted to migrate MONAI provided extension and mode to support the latest OHIF viewer version, but since MONAI in their provided extension using volume-based segmentation, which they are updating via voxel manager, but as of now OHIF viewer supports stack-based segmentation, how do I replicate this functionality?

Using OHIF Viewer: 3.11.0 beta.45

Stuck at updating/fixing the updateView function from MONAILabel/plugins/ohifv3/extensions/monai-label/src/components/MonaiLabelPanel.tsx at main · Project-MONAI/MONAILabel · GitHub

specifically in this region (line no. 334 - 374) :point_down:

if (override === true) {
const { segmentationService } = this.props.servicesManager.services;
const volumeLoadObject = segmentationService.getLabelmapVolume(‘1’);
const { voxelManager } = volumeLoadObject;
const scalarData = voxelManager?.getCompleteScalarDataArray();

    // console.log('Current ScalarData: ', scalarData);
    const currentSegArray = new Uint8Array(scalarData.length);
    currentSegArray.set(scalarData);

    // get unique values to determine which organs to update, keep rest
    const updateTargets = new Set(convertedData);
    const numImageFrames =
      this.getActiveViewportInfo().displaySet.numImageFrames;
    const sliceLength = scalarData.length / numImageFrames;
    const sliceBegin = sliceLength * sidx;
    const sliceEnd = sliceBegin + sliceLength;

    for (let i = 0; i < convertedData.length; i++) {
      if (sidx >= 0 && (i < sliceBegin || i >= sliceEnd)) {
        continue;
      }

      if (
        convertedData[i] !== 255 &&
        updateTargets.has(currentSegArray[i])
      ) {
        currentSegArray[i] = convertedData[i];
      }
    }
    convertedData = currentSegArray;
  }
  const { voxelManager } = volumeLoadObject;
  voxelManager?.setCompleteScalarDataArray(convertedData);
  triggerEvent(eventTarget, Enums.Events.SEGMENTATION_DATA_MODIFIED, {
    segmentationId: '1',
  });
  console.log("updated the segmentation's scalar data");
} else {
  console.log('TODO:: Volume Object is NOT In Cache....');
}