After parsing the dicom file through cornerstone.loadAndCacheImage and then transforming it into the data needed by vtk through getPixeLData(), why doesn't it show the model am I using it wrong?

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1

This is the relevant js I imported
import “@kitware/vtk.js/Rendering/Profiles/All”;
import vtkVolume from “@kitware/vtk.js/Rendering/Core/Volume”;
import vtkVolumeMapper from “@kitware/vtk.js/Rendering/Core/VolumeMapper”;
import vtkGenericRenderWindow from “@kitware/vtk.js/Rendering/Misc/GenericRenderWindow”;
import vtkPiecewiseFunction from “@kitware/vtk.js/Common/DataModel/PiecewiseFunction”;
import vtkColorTransferFunction from “@kitware/vtk.js/Rendering/Core/ColorTransferFunction”;
import vtkActor from “@kitware/vtk.js/Rendering/Core/Actor”;
import vtkMapper from “@kitware/vtk.js/Rendering/Core/Mapper”;
import vtkPolyData from “@kitware/vtk.js/Common/DataModel/PolyData”;
import { BlendMode } from “@kitware/vtk.js/Rendering/Core/VolumeMapper/Constants”;
import vtkImageData from ‘@kitware/vtk.js/Common/DataModel/ImageData’
Here’s how I wrote it.
cornerstone.loadAndCacheImage(imageId).then(
function (image) {
console.log(‘image’, image)
if (index !== 0) {
const pixelData = image.getPixelData()
console.log(“pixelData”,pixelData)

        const dataArray = vtkDataArray.newInstance({
          name: 'DICOM_PixelData',
          values: pixelData
        })

        const imageData = vtkImageData.newInstance()

        imageData.getPointData().setScalars(dataArray)

        _this.view = vtkGenericRenderWindow.newInstance({
          background: [0, 0, 0]
        })
        _this.renderer = _this.view.getRenderer()
        _this.renderWindow = _this.view.getRenderWindow()
        _this.volMapper = vtkVolumeMapper.newInstance()
        _this.vol = vtkVolume.newInstance()

        _this.volMapper.setInputData(imageData)
        _this.vol.setMapper(_this.volMapper)
        _this.view.setContainer(canvas)

        _this.loadPreset(_this.vol, _this.volMapper);
        _this.view.resize()

        _this.renderer.addVolume(_this.vol)
        _this.addVtkLinePoly(imageData)
        _this.renderer.resetCamera()
        _this.renderer.resetCameraClippingRange()
        _this.renderWindow.render()
      }

    },
    function (err) {
      console.log(err)
    }
  )
2

Hi,

We are not sure. If you are not using cornerstone3d for rendering, perhaps consider asking this question on the vtk forum?