General features contained complex numbers

[vkt1414]

Describe the bug
We ran pyradiomics extraction on segmentations produced by TotalSegmentator on NLST CT data. While rounding and saving general features, we found that there are complex numbers in a few cases. We do not necessarily know if is normal to have complex numbers or not.

To Reproduce
Steps to reproduce the behavior:
A colab notebook with the image series in question can be found here:
https://colab.research.google.com/drive/1BzgkUhdeSNmZWnswHkde9z2On8tlEcGR?usp%3Dsharing&sa=D&source=docs&ust=1709739967232788&usg=AOvVaw09YmF5IMwwrCuIIN3S9NSP

Version (please complete the following information):

• OS: Ubuntu
• Python version: 3.11
• PyRadiomics version 3.1.0

[pieper]

@vkt1414 can you be a little more specific? The notebook you linked to is very long. To help you get help, can you narrow down a specific example of a feature that results in a complex number? Maybe include a link to the cell?

[fedorov]

@pieper I had the same comment but held it back - this was in the context of TotalSegmentator application to NLST, and I think the easiest would be to wait for ~2 weeks or so so that we have segmentations in IDC, and after that we can have a very minimal example to replicate the issue. I do not think there is anyone eager to jump into investigating this at the moment anyway. I encouraged Vamsi to document the issue just so that we have a record of this happening.

[pieper]

No rush on my end. I was just curious to see if there was an easy answer and ran into this issue so I thought I'd give some feedback.

[vkt1414]

Thanks @pieper! I do not know which general feature contains the complex number yet. I can drill it down and will update the issue in a few weeks as @fedorov suggested.