How to get centerline IDs from a model?

Hi All,

I have a cylindrical model in which there are nodes present at the center of each axial location.

Is there a way to filter center nodes from whole set of nodes available in the model?

Imagine, I have no inputs or reference to find the center node available in the hm session?

When my tool is opened, I wanted to collect all the center nodes available in the model.

Please suggest me a way to achieve this...

Regards

Gopal