# Total number of radiomics features

**URL:** <https://discourse.slicer.org/t/total-number-of-radiomics-features/17947>\
**Category:** Radiomics\
**Created:** [June 4, 2021, 9:55am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947 "2021-06-04T09:55:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Chenglin\_Zhu](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chenglin_zhu/32/11031_2.png) [@Chenglin\_Zhu](https://discourse.slicer.org/u/Chenglin_Zhu)\
**Post date:** [June 4, 2021, 9:55am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947/1 "2021-06-04T09:55:58Z")

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Hello Slicer Community!

In Radiomics of Slicer, the maximum number of radiomic features is 130, which is mostly consistent with the number of features specified in the documentation of Pyradiomics ([Radiomic Features — pyradiomics v3.0.1.post4+gad5b2de documentation](https://pyradiomics.readthedocs.io/en/latest/features.html#) ).  
However, I read one research saying they extract about 1300 radiomic features using Pyradiomics, and a google search also specifies that " On average, Pyradiomics extracts ≈1500 features per image."

How to interpret these differences? And are there any disadvantages using Radiomic in Slicer than the Pyradiomics?

Appreciate.

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**Author:** ![mina](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/mina/32/8447_2.png) [@mina](https://discourse.slicer.org/u/mina)\
**Post date:** [December 10, 2021, 1:15am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947/2 "2021-12-10T01:15:31Z")

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hello,  
that’s my question too.  
also, sometimes for unknown reason it extracts 140 features instead of 130 features!

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**Author:** ![JoostJM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/joostjm/32/1091_2.png) [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Post date:** [January 11, 2022, 11:33am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947/3 "2022-01-11T11:33:12Z")

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The difference is due to the compounding effect of applying filters. This is possible in SlicerRadiomics if you use the parameters file. See the PyRadiomics documentation for more info.

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**Author:** ![harad](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/harad/32/14934_2.png) [@harad](https://discourse.slicer.org/u/harad)\
**Post date:** [April 11, 2022, 7:25am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947/4 "2022-04-11T07:25:34Z")

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I went through all mentioned documentation but would be really helpful to provide a working SlicerRadiomics PARAMETERS FILE (one that instructs ALL possible image types and feature classes) as an example and courtesy to those of us who are not coding experts. I would be enormously grateful. Thanks in advance and best regards, Marko

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**Author:** ![JoostJM](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/joostjm/32/1091_2.png) [@JoostJM](https://discourse.slicer.org/u/JoostJM)\
**Post date:** [May 3, 2022, 7:42am UTC](https://discourse.slicer.org/t/total-number-of-radiomics-features/17947/5 "2022-05-03T07:42:44Z")

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Parameter files can be found in the repository [here](https://github.com/AIM-Harvard/pyradiomics/blob/master/examples/exampleSettings). A good place to start would be [Params.yaml](https://github.com/AIM-Harvard/pyradiomics/blob/master/examples/exampleSettings/Params.yaml).