Now, monks in Tibet have been levitating rocks, with sound, for longer than recorded history.

So, i do not discount the idea.
However, that this is a tool for "doctors", and that they will be able to do amazing things, is a little hard to swallow.

First, "doctors" need to learn that vibration is the most important thing about health of a body. Chemicals are almost inconsequential to a person who has a decent diet. But, what do you expect from the medical industry that was literally started by a snake oil salesman.

Vibration is the most important aspect, and will become the most important field of study about the human body. And as such, you better be careful about injecting sound waves into the body.