FeatureExtractor values don't get along with reality value

Hello everyone,

I’m trying to understand my results that I get from pyradiomics - FeatureExtractor and I have two questions:

  1. I want to understand what values the extractor gets me, so I calculate manually the energy, max, min in the ROI to compare the results with pyradomics results. I didn’t get the same values. I checked this on the example in radiomics (brain) (with one label)
    my method - I upload the mask and the image to an float array with nrrd.read() and did manually calculate…for exp.- max(image[mask == 1])
    anyone can explain me why I don’t get the same values?

  2. what the different between seg Extract to voxel Extract?
    how can I analyse the voxel Extract?