Circular ROI in MRI image


Hello,
I do the segmentations on the MRI image but as shown in the figure I can’t get circular ROI. I use Segment Editor to segment. Is there any other method that gives circular shaped ROI?
Thanks in advance

Binary labelmaps approximate the shape at a given resolution. When you build a 3D representation it will look more spherical. If it’s not high enough resolution you can increase the resolution of the segmentation (Segment editor — 3D Slicer documentation). If you really want precise spheres or circles you could try some kind of parametric technique but usually that isn’t the best approach.

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Also note that you can segment these spheres or tubes fully automatically by using

  • Threshold effect, followed by
  • Islands effect → Split islands to segments
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Thanks for your help!

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