How dicom-parser.js works with vtk.js to achieve dicom file display #256
Comments
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It depends on what you're trying to do. For example: which modalities are you wanting to display: Dose, CT, PET, etc.? (0054,0081) only exists for Nuclear Medicine and PET. Dose files contain the entire dose volume as a single block; image series (CT, PET, MR, etc.) have each slice as a separate file. Are you wanting to display a volume as a whole, or just a single 2D image at a time? From the dicomParser side, you're going to want to just pass in the pixel data, not the whole byte array. See the "Usage" section in README for an example of getting the pixel data bytes (the pixelData variable there is what you'd pass to vtk). This VTK example might be helpful as well. |
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thank you for your reply
I modified the code, the pixel data of the dicom file should be passed this time, but nothing is displayed after running, is it my mistake?
I just got rid of medical imaging, and I am still not familiar with it, please guide me
test () {
axios.get('src/views/modules/generator/demo.dcm', {
responseType: 'arraybuffer'
}).then(response => {
this.render3DModel(response.data)
}).catch(error => {
console.error(error)
})
},
render3DModel (dicomData) {
const byteArray = new Uint8Array(dicomData)
const dataSet = DICOMParser.parseDicom(byteArray)
const pixelDataElement = dataSet.elements.x7fe00010
const pixelData = new Int16Array(dataSet.byteArray.buffer, pixelDataElement.dataOffset, pixelDataElement.length / 2)
const rows = dataSet.uint16('x00280010') || 1
const columns = dataSet.uint16('x00280011') || 1
const slices = dataSet.uint16('x00540081') || 1
const pixelSpacingX = dataSet.floatString('x00280030', 0) || 1
const pixelSpacingY = dataSet.floatString('x00280030', 1) || 1
const sliceSpacing = dataSet.floatString('x00180088') || 0
console.log("Rows:", rows);
console.log("Columns:", columns);
console.log("Slices:", slices);
console.log("Pixel Spacing X:", pixelSpacingX);
console.log("Pixel Spacing Y:", pixelSpacingY);
console.log("Slice Spacing:", sliceSpacing);
const dataArray = vtkDataArray.newInstance({
numberOfComponents: 1,
values: Array.from(pixelData),
dataType: 'Int16Array',
name: 'scalars'
})
const imageData = vtkImageData.newInstance()
imageData.setDimensions(rows, columns, slices)
imageData.setSpacing(pixelSpacingX, pixelSpacingY, sliceSpacing)
imageData.getPointData().setScalars(dataArray)
const volumeMapper = vtkVolumeMapper.newInstance()
volumeMapper.setInputData(imageData)
const volume = vtkVolume.newInstance()
volume.setMapper(volumeMapper)
const container = document.getElementById('vtk-container')
const fullScreenRenderer = vtkFullScreenRenderWindow.newInstance({
container: container,
background: [1, 1, 1]
})
try {
fullScreenRenderer.getRenderer().addVolume(volume)
fullScreenRenderer.getRenderer().resetCamera()
fullScreenRenderer.getRenderer().resetCameraClippingRange()
fullScreenRenderer.getRenderWindow().render()
} catch (error) {
console.error('erro：', error)
} finally {
console.log('end')
}
},
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发送时间: 2023年7月26日(星期三) 晚上10:15
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主题: Re: [cornerstonejs/dicomParser] How dicom-parser.js works with vtk.js to achieve dicom file display (Issue #256)
It depends on what you're trying to do. For example: which modalities are you wanting to display: Dose, CT, PET, etc.? (0054,0081) only exists for Nuclear Medicine and PET. Dose files contain the entire dose volume as a single block; image series (CT, PET, MR, etc.) have each slice as a separate file. Are you wanting to display a volume as a whole, or just a single 2D image at a time?
From the dicomParser side, you're going to want to just pass in the pixel data, not the whole byte array. See the "Usage" section in README for an example of getting the pixel data bytes (the pixelData variable there is what you'd pass to vtk).
This VTK example might be helpful as well.
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@1413194910 You probably want to default slice spacing to > 0. Other than that, your DICOM code looks reasonable. For the VTK side, you'll need to ask elsewhere, though. Try dannyrb's repo that @aodong8808 linked above (this file looks like a good place to start) or the vtk.js repo. If you have DICOM-specific questions, feel free to reopen and ask here. |
I'm not sure if I'm writing this correctly, so please enlighten me
The code is as follows
render3DModel (dicomData) {
// 使用dicom-parser解析DICOM文件
const byteArray = new Uint8Array(dicomData)
const dataSet = DICOMParser.parseDicom(byteArray)
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