Error using OpenDose 3D

[Oscar_Azula]

Hello,

I am working with patient images from a Lu-177 therapy study in 3D Slicer. After segmenting the organs and integrating the Absorbed dose rate, I am getting a mass of 0 for all segmented organs.
I would appreciate any guidance on what might be causing this issue.
Here are some additional details:
Imaging modality: SPECT/CT
Module used for dose calculation: OpenDose
Version 5.10.0
From what I understand, mass calculation depends on voxel volume and density (typically from CT Hounsfield Units), so I suspect there may be an issue with missing or incorrect intensity/density information.
Has anyone encountered this problem before or knows how to fix it?
Thank you in advance.

[Alex_Vergara]

It seems to me that your segmentations are actually delineations. The shell surrounding a volume is not the volume itself. Try converting your segmentations to be binary labelmaps and not closed surfaces as imported from rtstructs. This is a know issue that leads to have 0 mass. Let me know f this is not your case