The film 'Fantastic Voyage'(1966) becomes a reality in 2012.
This film made a lasting impression on me, about a scientist
who had a blood clot in his brain...
...had a micro minature submarine and crew, shrunk into
his blood vessels. They travelled to his brain to eliminate
the clot.
A Fantastic story at the time, has now become a reality
Swimming through the blood stream: Stanford engineers create wireless, self-propelled medical device (February 22, 2012)
For 50 years, scientists searched for the secret to making tiny implantable devices that could travel through the bloodstream. Engineers at Stanford have demonstrated just such a device. Powered without wires or batteries, it can propel itself though the bloodstream and is small enough to fit through blood vessels
Poon, an assistant professor of electrical engineering, is developing a new class of medical devices that can be implanted or injected into the human body and powered wirelessly using electromagnetic radio waves. No batteries to wear out. No cables to provide power. it can swim backwards, forwards, or in any direction. Being controlled from outside the body by a small coil that induces the signal that powers the micro device inside the body.
See Below..With Video
http://news.stanford.edu/news/2012/february/micro-device-implant-022212.html