Multicenter MRI data for radiomics features extraction

I want to run pyradiomics on my MRI data with 3D slicer, Considering that my data was prepared with different devices (1.5 and 3 Tesla) and the resolution of the images is also different.

  1. Are the features extracted from this package calculated relatively? (For fixing the resolution difference problem)
  2. And does the use of MRI devices with different field strength create a problem?