Doctors in London are trialling "touchless" technology, often used in TV games, to help them carry out delicate keyhole surgery. The system allows them to manipulate images with their voice and hand-gestures rather than using a keyboard and mouse. Surgeons say it gives them more control and avoids disruption. Independent experts say this approach could become the norm over the next ten or 15 years. Surgeons are increasingly reliant on 3D images to carry out complex and delicate procedures.