Measure Diameter using centerline length and surface

Community VMTK
1

I am trying to extract the radius at each point on the centerline from my tubular mesh. I am using the vmtk script vmtkDistanceToCenterlines and setting the variable EvaluateCenterlineRadius = True.

I was expecting this function to return a radius for each function on the centerline, however, the number of points returned is equal to the number of points in the surface mesh. I am confused with what this result signifies and I am wondering if there is a way to extract what I am interested in.

    distance_calculator = vmtkscripts.vmtkDistanceToCenterlines()
    distance_calculator.Surface = output_surface
    distance_calculator.Centerlines = centerline_points
    distance_calculator.UseCombinedDistance = False
    distance_calculator.UseRadiusInformation = False
    distance_calculator.EvaluateCenterlineRadius = True
    distance_calculator.ProjectPointArrays = False
    distance_calculator.UseCombinedDistance = False



    distance_calculator.RadiusArrayName = "Radius"    
    distance_calculator.Execute()
    distance = distance_calculator.Surface
    distance_to_centerline = distance.GetPointData().GetArray("Radius")```

Thank you all in advance for your help.
2

If your requirements do not confine you to vmtkscripts, you may consider using Slicer itself.

By installing SlicerVMTK extension using the extensions manager, you’ll find Cross-section analysis module that does what you want, and much more.