Vascular Modeling Toolkit: Centerline. The format of exported centerline.

The centerline curve was successfully obtained, but how can I define the format of exported file.
3D silcer gives 3 types of format: .mrk.json, .json and .fcsv.
As I want to preserve the structure and the metadata, I need to use .vtp or .vtk format.
Could someone help me to do next?
Thanks so much.

You should select the create model option on centerline module. That would give you a 3D model that contains polydata and the pointdata you want to save. After you create it, just click the save dialog and select the format you want

Hope it helps