# Slicer Heart - annulus angles in valve quantification

**URL:** <https://discourse.slicer.org/t/slicer-heart-annulus-angles-in-valve-quantification/29940>\
**Category:** Support\
**Created:** [June 9, 2023, 11:01am UTC](https://discourse.slicer.org/t/slicer-heart-annulus-angles-in-valve-quantification/29940 "2023-06-09T11:01:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![RGhosh](https://avatars.discourse-cdn.com/v4/letter/r/ce73a5/32.png) [@RGhosh](https://discourse.slicer.org/u/RGhosh)\
**Post date:** [June 9, 2023, 11:01am UTC](https://discourse.slicer.org/t/slicer-heart-annulus-angles-in-valve-quantification/29940/1 "2023-06-09T11:01:53Z")

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Operating system: Windows 10  
Slicer version: 5.2.1

In the SlicerHeart Valve Quantification module - there are several measurements made regarding annulus angles (bending angle, etc). How do we find out how these angles are calculated? We are wanting to use these quantitative results for analysis - but aren’t sure what to compare them to since we dont’ know how they were calculated.

Thank you!  
Reena

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**Author:** ![RGhosh](https://avatars.discourse-cdn.com/v4/letter/r/ce73a5/32.png) [@RGhosh](https://discourse.slicer.org/u/RGhosh)\
**Post date:** [June 9, 2023, 11:18am UTC](https://discourse.slicer.org/t/slicer-heart-annulus-angles-in-valve-quantification/29940/2 "2023-06-09T11:18:26Z")

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Also - follow up question: how come sometimes the billow and tenting height are calculated and other times its not? Are there detailed instructions for how to use each component of the slicer heart module? Thank you!