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 ...
Hospitals are just learning about and are very concerned that a shortage of the fluid they use to make CT scans and MRIs more readable may last until late June. For example, The University of Alabama ...
The ratio of the brightest white to the darkest black on a TV or computer monitor. The larger the number, the greater the extremes; for example, car headlights can appear brilliant next to the pitch ...
On April 14, 1994, a tragic friendly fire incident occurred in northern Iraq. Two American F-15 airplanes shot down two American helicopters, killing 26 people, primarily peacekeepers carrying out a ...
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