Is it possible to render with cycles a 3D texture from discrete image data (eg. image sequence)?
Basically I'm trying to get volume rendering of medical data with cycles.
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$\begingroup$ also discussed here :Using image sequence of medical scans as volume data in cycles $\endgroup$– BithurCommented Mar 24, 2019 at 21:49
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1 Answer
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I've had success importing CT data into blender using the free 32bit version of the open source DICOM viewer OsiriX, free registration required (1).
- Import your data into OsiriX
- Double click the image-sequence to open it in the 2D Viewer
- Choose "3D Surface Rendering" from the "2D/3D" button in the middle of the toolbar
- Select the desired level of detail and (most important) the brightness of the pixels which should be considered the "object" (2)
- Use the "3D-SR Export" button in the new "Surface Rendering" window to choose your preferred output format (.rib, .vrml, .iv, .obj or .stl)
I went with .obj and it imported smoothly into blender.
(1) OsiriX is Mac OS X only. The site http://www.idoimaging lists free medical image viewing software for many platforms. Maybe there is one with a similar feature set…
(2) Maybe you have to experiment a little in finding the right values. The available presets for Skin, Bones and Metal usually work just fine, but I have to admit, that I have no medical knowledge and therefore cannot say if this would be the case with all the CT/MR data sets out there.
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$\begingroup$ thank for the nice tutorial. Will use it as a fall-back if our data allows it. I found out that although cycles can render volume data (transfer functions and all), the volume shaders can only handle input from either a texture node or a smoke domain. Internally the smoke domain is identical to a volume dataset. Tag-line is voxel data input for cycles and that is define in the blender issue tracker but as of yet, nobody is working on it: developer.blender.org Similar question: link $\endgroup$– xalphaCommented Nov 3, 2014 at 14:51
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