# How to measure vessel diameter

**URL:** <https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713>\
**Category:** Support\
**Tags:** vmtk\
**Created:** [September 26, 2020, 3:11am UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713 "2020-09-26T03:11:25Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Hamid](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hamid](https://discourse.slicer.org/u/Hamid)\
**Post date:** [September 26, 2020, 3:11am UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/1 "2020-09-26T03:11:25Z")

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I need to measure the diameters of vessels(Descending aorta and 3 vertebral arteries) in my segmented model.How can I do that?Do I need any Extension?

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**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [September 26, 2020, 8:00pm UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/3 "2020-09-26T20:00:21Z")

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If your model is created in Slicer with Segment Editor, i.e, a Segment of a Segmentation node, you can use VMTK extension for that. Use Extract Centerline to create a Centerline of the aorta, then Centerline Metrics to get the diameters in a chart and in a table. This output is more readable if you generate non-bifurcated distinct centerlines (you seem to target branches of the aorta as well).

(It 's better to create dedicated topics for specific problems, rather than branching off like here.)

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**Author:** ![Hamid](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hamid](https://discourse.slicer.org/u/Hamid)\
**Post date:** [September 29, 2020, 11:12pm UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/4 "2020-09-29T23:12:52Z")

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Thank you so much.  
Does anybody know the free software(even trial version) for extracting flow data from CT-images?

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**Author:** ![Hamid](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hamid](https://discourse.slicer.org/u/Hamid)\
**Post date:** [September 30, 2020, 4:45pm UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/5 "2020-09-30T16:45:51Z")

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I have made a thick shell from lumen. Now I need to polish the mesh model but I don’t want to get back to the ct-images and modify the model.I’d like to use a module to remove the sharp corners,fill any undesirable holes and … using the shell model.  
any help is appreciated

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**Author:** ![Hamid](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hamid](https://discourse.slicer.org/u/Hamid)\
**Post date:** [September 30, 2020, 7:43pm UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/6 "2020-09-30T19:43:49Z")

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is there any way to cut in straight line using scissors?

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**Author:** ![Hamid](https://avatars.discourse-cdn.com/v4/letter/h/5fc32e/32.png) [@Hamid](https://discourse.slicer.org/u/Hamid)\
**Post date:** [September 30, 2020, 8:06pm UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/7 "2020-09-30T20:06:33Z")

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I have two object in slicer 3d and want to move one of them and connect together.How can I move an abject?

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**Author:** ![liam26](https://avatars.discourse-cdn.com/v4/letter/l/858c86/32.png) [@liam26](https://discourse.slicer.org/u/liam26)\
**Post date:** [December 22, 2025, 12:37am UTC](https://discourse.slicer.org/t/how-to-measure-vessel-diameter/13713/8 "2025-12-22T00:37:44Z")

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The table radius is the average of all cross-sectional radii?