RadiAnt DICOM Viewer version 2022.1.1 , the "serial number" refers to a paid license code required for full software activation. This version was released on August 17, 2022, and included specific fixes for activation issues and improved support for certain medical image formats. RadiAnt DICOM Viewer Licensing Options Paid Subscription

Regularly update the software to benefit from new features, bug fixes, and security enhancements.

If you want to remove the trial banners or use the software in a professional setting, the developer moved to a subscription model in 2021: Subscription Plans : Prices start around €5 (~$6) for one month €39 (~$47) for a full year Accessing Lost Keys

: After completing the payment, your unique serial number will be sent to your registered email address. Open RadiAnt DICOM Viewer on your PC. Select the Activation option from the startup screen or menu. Enter your serial number and click to complete the process. Safe Alternatives Free Trial : If you need to evaluate the software, Medixant offers a Free Trial Version