How to solve the loss of precision in the process of voxel transformation of mesh？

[Dobmod]

I'm sorry I haven't had time to use the library yet. But I have a question to ask. When I export the stl segmentation file to nrrd or nii format use
ing 3d slicer, I will face a great loss of precision. Does the library solve this problem, and if so, is it related to the resolution of ReferenceImage? Thank you very much!!

[Dobmod]

It would be nice if we could set the resolution.

[vcasellesb]

Hi. Apologies for the delayed response, I've been very busy. I'm sorry, but as the code is right now, the resolution of the ReferenceImage is the resolution that the resulting .nii file will have. If you have any suggestions on how to change that, I'd love to hear them. Honestly, I'm not an expert in stl meshes whatsoever.

[Dobmod]

Hi. Apologies for the delayed response, I've been very busy. I'm sorry, but as the code is right now, the resolution of the ReferenceImage is the resolution that the resulting .nii file will have. If you have any suggestions on how to change that, I'd love to hear them. Honestly, I'm not an expert in stl meshes whatsoever.

Thank you for taking the time to respond. I am trying to solve this problem through Slicer Python API!

[vcasellesb]

Hi @Dobmod ,

Please let me know if you find out the solution!

Thanks!
Vicent

[Dobmod]

Hi @vcasellesb , I first attempted resampling to enlarge the ReferenceImage, and then used it to export the STL. This way, I achieved less loss!

[vcasellesb]

Hi @vcasellesb , I first attempted resampling to enlarge the ReferenceImage, and then used it to export the STL. This way, I achieved less loss!

Dear @Dobmod,

I'm glad you figured it out! Of course, the resulting nifti segmentation converted from the stl is going to match the dimensions and spacing from the reference image, so changing those is a good way to achieve it. However, I think it's very specific to your use case.