Robert Heinlein predicted this!...............
Doctors might have their own sonic screwdriver type tool one day.
IIRC Dr. McCoy on Star Trek used avant garde metal salt and pepper shakers to treat his patients . :)
Robert Heinlein predicted this!...............
Radionics has been discredited by the medical industry from early last century.
And a frequency generator is used in Kirlian photography to capture the ‘aura’ of a person on film.