DICOM gray level normalization , 3 sigma normalization

Hi, I am a radiologist who is interests in texture analysis and radomics.
I am a beginner at 3Dslicer. Firstly I want to ask, how can I use 3sigma normalization technique in DICOM images. I don’t know how can ı do it? can you help me?
Thanks.

Some normalization can be done in pyradiomics as part of that analysis:

Or you could use numpy operations on the pixel data to implement the statistics and normalization in a few lines.

https://slicer.readthedocs.io/en/latest/developer_guide/script_repository.html#modify-voxels-in-a-volume

Hi, I don’t understand how to do this (normalization) what should i write in the python interactor in the 3D slicer? I have tried to do it but I couldn’t make it. could you help me please? thanks