# Compliance with IBSI

**URL:** <https://discourse.slicer.org/t/compliance-with-ibsi/12062>\
**Category:** Radiomics\
**Created:** [June 17, 2020, 2:54am UTC](https://discourse.slicer.org/t/compliance-with-ibsi/12062 "2020-06-17T02:54:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Bassam](https://avatars.discourse-cdn.com/v4/letter/b/b38774/32.png) [@Bassam](https://discourse.slicer.org/u/Bassam)\
**Post date:** [June 17, 2020, 2:54am UTC](https://discourse.slicer.org/t/compliance-with-ibsi/12062/1 "2020-06-17T02:54:45Z")

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Hello team,

I got a promising imaging biomarkers and I have to check their compliance with their reference values identified by IBSI. To do that, I have to specify the following settings in the parameter file (yaml file), so kindly, how can I specify all of them in the parameter file ?

Interpolation: Yes  
resampled voxel spacing (mm): 2 x 2 x 2  
interpolation method: trilinear  
intensity rounding: nearest integer  
ROI interpolation method: trilinear  
ROI partial mask volume: 0.5

Thanks

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**Author:** ![fedorov](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/fedorov/32/14_2.png) [@fedorov](https://discourse.slicer.org/u/fedorov)\
**Post date:** [June 18, 2020, 2:48am UTC](https://discourse.slicer.org/t/compliance-with-ibsi/12062/2 "2020-06-18T02:48:51Z")

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I don’t think ROI interpolation is supported, but setting image interpolation will be done by the following lines in the settings file:

```auto
  interpolator: 'sitkBSpline'
  resampledPixelSpacing: [2,2,2]

```

You can find example settings here: [https://github.com/Radiomics/pyradiomics/tree/master/examples/exampleSettings](https://github.com/Radiomics/pyradiomics/tree/master/examples/exampleSettings)

You may also find this discussion relevant:

> <https://github.com/Radiomics/pyradiomics/issues/498>
>
> Hello, I'm doing a project on radiomics and I've been trying to compare the results of the features calculated with pyradiomics...

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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:** [June 30, 2020, 10:28am UTC](https://discourse.slicer.org/t/compliance-with-ibsi/12062/3 "2020-06-30T10:28:05Z")

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The linear interpolation for the image in PyRadiomics can be achieve using `sitkLinear` interpolation. ROI interpolation is always forced to nearest neighbor, as PyRadiomics supports multiple mask values, which can result in unintended change of label value when using linear interpolation with thresholding.