# Missing IBSI fetaures in Pyradiomics.

**URL:** <https://discourse.slicer.org/t/missing-ibsi-fetaures-in-pyradiomics/22325>\
**Category:** Radiomics\
**Created:** [March 5, 2022, 2:28pm UTC](https://discourse.slicer.org/t/missing-ibsi-fetaures-in-pyradiomics/22325 "2022-03-05T14:28:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JonasB](https://avatars.discourse-cdn.com/v4/letter/j/8e7dd6/32.png) [@JonasB](https://discourse.slicer.org/u/JonasB)\
**Post date:** [March 5, 2022, 2:28pm UTC](https://discourse.slicer.org/t/missing-ibsi-fetaures-in-pyradiomics/22325/1 "2022-03-05T14:28:09Z")

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Dear Community.

I noticed some Issues with missing features from the IBSI recommendation in Pyradiomics.  
I went through the feature definitions and compared them (IBSI: [https://pubs.rsna.org/doi/full/10.1148/radiol.2020191145](https://pubs.rsna.org/doi/full/10.1148/radiol.2020191145), Pyradiomics: [https://pyradiomics.readthedocs.io/](https://pyradiomics.readthedocs.io/)).  
Some features like Compactness 1 & 2, Asphericity, Sum variance, Dissimilarity, etc. are equal or highly correlated to other features. I think it makes sense to exclude those.  
But I detected a bunch of missing features that are included in the IBSI feature definition but not in Pyradiomics.

I was wondering if there is any justification I am missing or if it is possible to include those into the feature set?:  
**Intensity-based statistical features:**  
Intensity-based median absolute deviation  
Intensity-based coefficient of variation  
Intensity-based quartile coefficient of dispersion  
**Morphological features**  
Centre of mass shift  
Volume density (axis-aligned bounding box)  
Volume density (oriented minimum bounding box)  
Area density (oriented minimum bounding box)  
Volume density (approximate enclosing ellipsoid)  
Area density (approximate enclosing ellipsoid)  
Volume density (minimum volume enclosing ellipsoid)  
Area density (minimum volume enclosing ellipsoid)  
Volume density (convex hull)  
Area density (convex hull)  
Integrated intensity  
Moran’s index  
Geary’s C measure  
**Local intensity features**  
Local intensity peak  
Global intensity peak  
**Intensity histogram features**  
Intensity histogram mode  
Intensity histogram mean absolute deviation  
Intensity histogram robust mean absolute deviation  
Intensity histogram median absolute deviation  
Intensity histogram coefficient of variation  
Intensity histogram quartile coefficient of dispersion  
Minimum histogram gradient  
Minimum histogram gradient intensity  
**Intensity-volume histogram features**  
Volume at intensity fraction  
Intensity at volume fraction  
Volume fraction difference between intensity fractions  
Area under the IVH curve

Hope for help.  
Thank you in advance.

Best,  
Jonas

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [March 5, 2022, 4:12pm UTC](https://discourse.slicer.org/t/missing-ibsi-fetaures-in-pyradiomics/22325/2 "2022-03-05T16:12:43Z")

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Funding and active development of pyradiomics finished a few years ago and the developers included what they felt to be the most important features with the resources available. If someone is motivated to implement additional features (and documentation and tests) it should be possible to expand the list.