Automatic paint tool along curve

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1

Hello,

I want to implement a paint tool that can automatically follow a path so I can set the radius and threshold and get the segmentation from the beginning to the end of the curve. Can anyone give some idea how to do it?

Thanks,

2

With some python scripts you can do that. You could look at the Endoscopy module and the Segment Editor code to find the logic parts you would need. Tracing along a curve with threshold painting could be a good way to segment faint vessels.

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3

You may have a look at the ‘Curve centerline extraction’ module in SlicerVMTK extension, that you can install from the ‘Extension manager’. It segments along a curve using ‘Flood filling’ and not ‘Paint’ tool. You can specify the radius, and tune the intensity range until you get a satisfactory result. Very poorly contrasted vessels may be out of scope though.

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4

Filling a segment around a curve with a specified radius is already available in the “Draw tube” effect in Segment Editor, after you install “SegmentEditorExtraEffects” extension.

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5

Thanks.
But we are interested in adjust radius and intensity in each point given some conditions. Maybe the easiest way to do it is modify “Draw tube” code?

6

Sample images would be helpful.

7

What would you like to achieve? Generate a vascular network? Would you like to get a surface mesh or synthetic CT as output? Where do the input curves come from?

8

Yes, we want to generate vessels having in count the curve points neighbourhood, so we can adjust parameters like radius or threshold.
Pseudocode may look like:

curve = MarkupsCurve(...)
for point in curve:
      radius = adjustRadius(point)
      threshold = adjustThreshold(point)
      applyPaint(point, radius, threshold)

We want a segment as output.

Thanks :slight_smile: