How to construct the ".gz" file loaded in the vtk.js example

Web
1

const reader = vtkHttpDataSetReader.newInstance({
fetchGzip: true,
});
reader.setUrl(${__BASE_PATH__}/data/volume/headsq.vti, { loadData: true }).then(() => {});
In this example，The loaded file headsq.vti consists of a .gz file and a JSON file,The Json file I can copy the example to build，but the .gz file I can’t build。How do I build dicom image into .gz file.

2

You should use itk.js to directly read your DICOM. vtkHttpDataSetReader has its own format that is optimized for network and I don’t think you need to convert your data to that format in order to load it inside vtk.js.

1 Like
4

Thank you for your reply.I built vtkImageData by parsing pixel data in DICOM and loaded it into vtk.js,But it takes too long to load the DICOM data in network, I also want to compress the DICom data into .gz file and load it through vtkHttpDataSetReader,How do I build DICOM image into .gz file.

5

the .gz files are the raw bytes of your array compressed as gzip. Basically the same thing as Numpy tofile. The json metadata just describe what those bytes are.