As I managed to understand ,you are working with ViewModels, so when you need re-initializing, you can re-structure, change your ViewModels and re-bind the RadTreeView. Could you please be more precise of what you are trying to achieve so that we could provide with more detailed advice.
On the other hand, the RadTreeViewItem exposes SelectedImageSrc property, could it fit in your scenario ?
the Telerik team
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