mode = a (ACR), x (Explicit VR Dicom), r (RAW : only pixels)
noshadow : user doesn't want to load Private groups (odd number)
noseq : user doesn't want to load Sequences
mode = a (ACR), x (Explicit VR Dicom), r (RAW : only pixels)
noshadow : user doesn't want to load Private groups (odd number)
noseq : user doesn't want to load Sequences