To never lose your serial, save the email and also run this PowerShell command to back up the registry key:
reg export "HKCU\Software\Medixant\RadiAnt\Options" Radiant_license_backup.reg serial number radiant dicom viewer
This goes beyond basic "where to find it" and explores the why, how, and what-if regarding serialization, licensing, and forensic tracking. In Radiant (specifically RadiAnt DICOM Viewer by Medixant), the term "Serial Number" refers to two distinct, non-connected concepts: To never lose your serial, save the email
| Aspect | License Activation Key | DICOM UID (Series Instance UID) | | :--- | :--- | :--- | | | Unlocks Pro features (MPR, measurements, export) | Uniquely identifies a scan series (e.g., a CT localizer) | | Format | Alphanumeric groups (e.g., XXXXX-XXXXX-XXXXX ) | Numeric dotted string (e.g., 1.2.840.113619... ) | | User visibility | Entered in "License" dialog | Seen in patient browser, DICOM tags (0020,000E) | | Persistence | Tied to machine hardware ID | Tied to the study/series, burned into DICOM header | To never lose your serial