I am trying to add space directions to an nrrd file that was created using pynrrd. If I modify the header of the nrrd file, I am getting an error in Slicer: ITK exception info: error in unknown: Could not create IO object for reading file xxxxxxxxxxxxxxxxxxxxxxxxx (edited out user file) Tried to…

Using some old fashioned grind it out, anyone landing here from search the solution was if you want to modify ‘space directions’ you need to also have the following elements in the header ‘space origin’ ‘space’ If you are missing one, it produces the error above (essentially ‘this is not an nrrd …

Slicer rejects modified Header

Support

lassoan (Andras Lasso) April 17, 2024, 2:48am 2

I would recommend to copy the entire header from the source image. If you still have problems then please upload the script and an example nrrd file somewhere and post the link here so that we can have a look.

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Slicer rejects modified Header

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