# Refine brain vessel segmentation

**URL:** <https://discourse.slicer.org/t/refine-brain-vessel-segmentation/5704>\
**Category:** Support\
**Created:** [February 8, 2019, 8:41pm UTC](https://discourse.slicer.org/t/refine-brain-vessel-segmentation/5704 "2019-02-08T20:41:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![albert94](https://avatars.discourse-cdn.com/v4/letter/a/898d66/32.png) [@albert94](https://discourse.slicer.org/u/albert94)\
**Post date:** [February 8, 2019, 8:41pm UTC](https://discourse.slicer.org/t/refine-brain-vessel-segmentation/5704/1 "2019-02-08T20:41:45Z")

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Hi all,  
I am trying to segment cerebral vessels from CT and MR images. First I apply swiss skull stripper to the volume, and then I threhold the immediate result by Threshold Scalar Volume module. Now I get the following results

 ![ct](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/e/cea9115300618529e4b2812df1c4fe73a51e7972.jpeg)

But they are not good enough. Is there a way to refine this result?

Thank you for your advice.

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**Author:** ![marie](https://avatars.discourse-cdn.com/v4/letter/m/bc8723/32.png) [@marie](https://discourse.slicer.org/u/marie)\
**Post date:** [November 17, 2019, 8:49pm UTC](https://discourse.slicer.org/t/refine-brain-vessel-segmentation/5704/2 "2019-11-17T20:49:10Z")

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See here:

> [@Problems when segmenting blood vessels using VMTK (threshold)](https://discourse.slicer.org/t/problems-when-segmenting-blood-vessels-using-vmtk-threshold/8536/2):
>
> Have you tried the [“Vessel Segmentation By Subtraction” segmentation recipe](https://lassoan.github.io/SlicerSegmentationRecipes/VesselSegmentationBySubtraction/)?