For 130 years the dental radiograph has recorded one thing: how much of the beam a tissue absorbs. Phase-contrast and dark-field imaging read the X-ray differently — through the bending and scattering of the wave itself — and in doing so they render the edges,...
Between infrared light and microwave radio lies a band the eye has never seen and the X-ray has never needed. Terahertz imaging is learning to read enamel in that gap, with no ionizing dose at all....
A five-year, $3.1 million award is building a system that carries oral imaging out of the operatory and into obstetric clinics, phones, and the hands of patients themselves. When the picture is no longer made in a controlled room by a trained hand, the demands...