Hi everyone, i'm new on Slicer. I really need some help

Support
1

Operating system: Windows 10
Slicer version: 4.11.202

How can i segment ribs cartilages?

I’m ok with bone of chest. Sternum and ribs. But i really need cartilages.

I’m Thoracic Surgeon and need that for my pectus excavatum patients.

Thank you for the help

2

You can use “Grow from seeds” effect with intensity masking to segment structures that have similar intensity, similar to this:

The difference for bone+cartilage segmentation are the followings:

  • Set the editable intensity range (using Threshold effect) to include cartilage but exclude soft tissues as much as possible (to avoid the segmentation leaking too much into soft tissues).
  • Use “bone”, “cartilage”, and “other” segments. You would put small seeds in bone and cartilage. You would use the “other” segment to paint seeds into soft tissues that are within the intensity range that you specified (to prevent them to be added to the the cartilage segment).
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Thx so much!.
I did my first real model. It’s not perfect, but it is a start.

3D PECTUS DC
3D PECTUS DC922×853 77.8 KB

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4

Thanks for the update. It seems that you are on the right track.

You can try lowering the editable intensity range value to have less holes in the cartilage (of course that may bring in more noise from surrounding soft tissues).

You may also try to disable editable intensity range when you are done with the region growing and apply smoothing to fill in small holes.