– Consider 3D Slicer , Horos (macOS), ITK-SNAP , or Weasis if you need a zero-cost DICOM viewer.
RadiAnt is commercial software and requires a valid subscription. You can obtain a key through the following official channels: Official Purchase radiant dicom viewer license key
On an internet-connected device, visit the RadiAnt Activation Page. – Consider 3D Slicer , Horos (macOS), ITK-SNAP