Hi!

Based on the preoperative MRI, I am trying to reconstruct the sellar region tumor( green part) and the surrounding peritumor capsule( red part) by using 3Dslicer, and try to calculate the coverage of the sellar diaphragm barrier through the reconstruction of the sellar diaphragm barrier, so as to further study the risk of intraoperative cerebrospinal fluid leakage. The core problem was: is it possible to figure out the superficial area of green part which is covered by red? and how?

Thanks !

It is not a trivial task, but you can try the following. Export the segmentation to models, then compute distance between the two meshes (using Model to Model Distance extension). Then extract the parts that are at a certain distance range. You can experiment with the threshold range in Models module, in Display â†’ Scalars â†’ Threshold.

I have try the Models section but I canâ€™t compute distance between the two meshes (using Model to Model Distance extension) as you said before, Can you provide more details on this kind of calculation method ? Or show a simple example ? thank you very much!

Please describe what you did, what you expected to happen, and what happened instead.

I think Iâ€™m stuck at the first step. I exported the two segmentations to models as the picture shows, then I try to find the â€śmodel to model distance extensionâ€ť in the models section menu but I couldnâ€™t . All I can do were just changing the look of the model and clipping selected model(I was confused about this clipping also). My goal is to figure out the superficial area of specific part which is covered by the other part, for example can we calculate the surface area of the skull covered by the green part ?

Model to model distance module takes model nodes as inputs. You can export the segmentation to model node by right-clicking on it in Data module.

Select the â€śExport visible segments to modelsâ€ť menu item.