problem extracting faces after importing model

[James Goldfarb]

I am a new user and have gone through the workflow (contours, etc.), including running simulations, with both the demo project and my own images. Based on this, I believe my installation is functioning correctly.

Currently, I am trying to import a model generated from a 3D Slicer segmentation. I am following the guidance provided in the SimVascular FAQ on importing models:
https://github.com/SimVascular/SimVascu ... ls_into_SV.

The model imports without issue, but I am encountering problems during face extraction. Regardless of the angle settings I use, multiple faces are generated. The first face appears to be the entire surface, while the other faces seem to be empty.

Here is my workflow
I am using a simple piece of the aorta, so there should be 2 faces.
Convert the segmentation to a label map in 3d slicer.
Use the Model Maker extension to create a surface model.
Save the resulting model as a .vtp file.
Open the file in ParaView, triangulate the surface, and save it as a .vtp.

Does anyone have suggestions for resolving this issue or know of additional references that could help?

Also, I already have the faces defined in slicer are there instructions on importing faces?

[David Parker]

Hello,

Is your imported model closed (i.e. do the vessel inlets/outlets have planar surfaces) ? If not then you need to select the Fill Holes w. IDs button in the SV Modeling Tool panel.

You can send me the model (davep@stanford.edu) and I can have a look.

Cheers,
Dave

[David Parker]

Hello,

The geometry you are trying to import into SV has many ridges

Screenshot 2024-11-25 at 12.55.33 PM.png (538.55 KiB) Viewed 325 times

that will cause problems identifying model surfaces. It will also cause problems with meshing and simulation.

You will need to create a surface geometry that is smooth and has planar surfaces capping vessel ends. The vessel ends can also be open but the hole boundary needs to be planar so they can be identified.

Cheers,
Dave