Photoacoustic imaging (PAI) is an emerging tool that bridges the traditional depth limits of ballistic optical imaging and the resolution limits of diffuse optical imaging. Using the acoustic waves ...

Contrast ratio is the most important aspect of a TV's performance. More than any other single metric, a set's contrast ratio will be the most noticeable difference between two TVs. That is, if you ...

Contrast ratio, put simply, is the difference between the brightest a TV can be, and the darkest. More so than color ( quantum dots or otherwise), resolution ( 4K or otherwise) or other aspects of ...

Many U.S. hospitals are postponing scans used to diagnose diseases after a Covid lockdown in China hobbled the main U.S. supplier of an imaging chemical. By Reed Abelson Doctors cannot seem to ...