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What are your exact needs and what hardware are you using to scan with?
A great many multi-function machines with document feeders come with their own scanning software that interfaces with NVDA quite well.
More detail is necessary.
Brian - Windows 10 Home, 64-Bit, Version 1703, Build 15063 (dot level on request - it changes too often to keep in signature)
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
~ Niels Bohr