Engineers Announce Plastic, Air- And Light-driven Device More Precise Than Human Hand

At Johns Hopkins Urology Robotics Lab, engineers have invented a motor without metal or electricity that can safely power remote-controlled robotic medical devices used for cancer biopsies and therapies. It is guided by magnetic resonance imaging allowing increased accuracy in locating and collecting tissue samples, reduce diagnostic errors and also improve therapy. It is the start of an age of robotic image-guided surgeries to better target, diagnose and treat cancers with minimally invasive techniques.
http://www.sciencedaily.com/releases/2007/04/070406145338.htm