By design RadPivotGrid is implemented for business intelligence purposes and it is a data summarization tool. It aggregates the data coming from a data table or a data cube (OLAP), and then this data is displayed to the end-user. Its UI can't be used outside the context of this scenario, hence it can't be used in unbound mode.
You can either use our RadGridView
applying a GroupDescriptor
for the groups handling CellFormatting
for the images, or RadPropertyGrid
handling the ItemFormatting
for the images.
All the best,
the Telerik team