# Can I calculate the feature "Ellipsoidity" of one 3D segmentation

**URL:** <https://discourse.slicer.org/t/can-i-calculate-the-feature-ellipsoidity-of-one-3d-segmentation/11750>\
**Category:** Radiomics\
**Tags:** segmentation, dicom\
**Created:** [May 28, 2020, 2:40pm UTC](https://discourse.slicer.org/t/can-i-calculate-the-feature-ellipsoidity-of-one-3d-segmentation/11750 "2020-05-28T14:40:37Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [May 28, 2020, 4:19pm UTC](https://discourse.slicer.org/t/can-i-calculate-the-feature-ellipsoidity-of-one-3d-segmentation/11750/2 "2020-05-28T16:19:37Z")

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I don’t know what pyradiomics can compute, but you can use Slicer’s segment statistics module to compute many shape metrics: roundness, flatness, elongation, principal moments, principal axis directions, oriented bounding box diameters, Feret diameter, etc. This allows rich shape characterization, including assessing “ellipsoidity”.

See some more information in this topic:

> [@New Segment Statistics: Oriented Bounding Box, Diameter and More](https://discourse.slicer.org/t/new-segment-statistics-oriented-bounding-box-diameter-and-more/10203):
>
> New statistics have been added to the Segment Statistics module: Centroid Oriented bounding box Feret diameter Perimeter Roundness Flatness Elongation Principal axes/moments These statistics are not enabled by default. To enable them, click on the “Options” button beside the “Labelmap Statistics” checkbox, and select the statistics that you would like calculated from the popup window. You can read the documentation for the Segment Statistics module [here](https://slicer.readthedocs.io/en/latest/user_guide/module_segmentstatistics.html). Oriented bounding box:

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