Why does using PvD enable the Radiology group to maintain user changes?

Personal vDisk technology redirects all user-specific changes, including application installations, data, and configuration settings, to a dedicated virtual disk, ensuring these changes persist across sessions and are independent of the underlying master image.

While PvD does retain registry information, this is a specific component of user changes and not the overarching reason for its independence from the base image.

PvD's primary function is not simply to allow local profiles, but to persist all user-specific changes on a separate virtual disk.

PvD's function is to persist user-specific changes, not to retain computer policy settings from Active Directory GPOs, which are typically applied by the directory service itself.