# Parameter settings for Levelset segmentation in coronary artery segmentation

**URL:** <https://discourse.slicer.org/t/parameter-settings-for-levelset-segmentation-in-coronary-artery-segmentation/20651>\
**Category:** VMTK\
**Created:** [November 17, 2021, 5:39am UTC](https://discourse.slicer.org/t/parameter-settings-for-levelset-segmentation-in-coronary-artery-segmentation/20651 "2021-11-17T05:39:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![biplabketan](https://avatars.discourse-cdn.com/v4/letter/b/ecc23a/32.png) [@biplabketan](https://discourse.slicer.org/u/biplabketan)\
**Post date:** [November 17, 2021, 5:39am UTC](https://discourse.slicer.org/t/parameter-settings-for-levelset-segmentation-in-coronary-artery-segmentation/20651/1 "2021-11-17T05:39:49Z")

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Please let me know the correct parameter settings for **levelset segmentation** for coronary artery segmentation. Also, how the number of iterations can be selected? What is the significance of it and what is the convergence criteria?

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**Author:** ![kayarre](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/kayarre/32/3606_2.png) [@kayarre](https://discourse.slicer.org/u/kayarre)\
**Post date:** [November 29, 2021, 11:35pm UTC](https://discourse.slicer.org/t/parameter-settings-for-levelset-segmentation-in-coronary-artery-segmentation/20651/2 "2021-11-29T23:35:53Z")

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hi @biplabketan and welcome.

This depends on the kind of images you have. how noisy? how much contrast? Usuallly one has to play around with the values. a good place to start is using slicer and playing around with the threshold segmentation to get an idea for values that get close the vessel edges. I believe Luca Antiga’s thesis, ITK, or Slicer documentation could provide some insight.