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lassoan

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  1. I would be happy to help you with verifying that the exported files are valid. If you want to try it yourself, it should be quite easy: drag-and-drop the nrrd file on 3D Slicer application window and click OK to load it. If loading is successful, you'll see three orthogonal views in the slice viewers.
  2. Yes, nrrd format has a variant consisting of a simple text header file (.nhdr) that describes the image geometry, voxel scalar type, etc., and a bulk data file (.raw) that contains voxel values. NRRD readers/writers area available in all medical image computing software and toolkits that I know of, so it should be enough to have this single export file format. We have very similar experience with VR. It's not just that it provides wall-sized, immersive stereo display, but it also allows directly grabbing and manipulating objects as in the real world. It can actually replace 3D printing in many use cases (but probably Ultimaker forum is not the best place to discuss this).
  3. Yves, can your software export volumes to open research image file formats such as nrrd or mha? That would allow segmentation and model generation using cutting-edge open-source tools, such as 3D Slicer's Segment Editor, or ITK-snap. 3D Slicer can also do virtual reality visualization of data sets, not just 3D but 4D as well, using HTC Vive, Oculus Rift, and any other Openvr-capable headsets, even without segmentation - using direct volume rendering, you can combine models with imported CAD models, etc. So, export is really important, if somebody needs sophisticated processing, visualization, or analysis.
  4. You need to ask them what file formats it can save the 3D and 4D images into. If they just say "DICOM" it is not enough, as often 3D data is saved into private DICOM tags, which can only be interpreted by proprietary software, so you cannot load it into 3D Slicer or other software that segments the image and writes to STL. Probably the best is to ask for sample 3D and 4D files that the device can export. If you share those sample files with me I can check if they are usable.
  5. I've implemented a GE/Kretz 3D ultrasound image reader in 3D Slicer. After you have loaded the image you can use all the awesome tools in 3D Slicer to visualize and process it (for example, to create a 3D-printable model). You can see a demo here: It's not perfect yet (spherical to Cartesian conversion is not fully accurate), but it's completely free and open-source - fixes and improvements are welcome. For further details and questions please post to the 3D Slicer forum: https://discourse.slicer.org/t/loading-of-ge-kretz-ultrasound-volumes-vol-file/808/14?u=lassoan
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