The laser system, which includes a low-cost, portable scanner, is extremely accurate, according to the research team, and it also still recognised surface patterns after the materials had been abused.

BBC: NEWS | Technology | Laser spots paper 'fingerprints'

LONDON, England -- A Australian electrical engineer is developing a portable brain scanner that could help prevent people from suffering brain damage after they have a stroke.

CNN: Bluetooth device to save stroke victims

George Sutherland, professor of cardiac imaging at St George's, London, shows how the portable handheld ultrasound scanner works.

BBC: How the hand-held ultrasound scanner works

The Smartphone Film Scanner is a (comparatively) portable device that straps onto any iPhone and "most" Android phones.

ENGADGET

In 2002, GE innovated a portable, easy-to-use, ultra-low-cost ultrasound scanner that was able to address the unique market needs in China.

FORBES: Reverse Innovation and the Myth of Cannibalization