Direct mechanisms of kidney injury from exposure to contrast agents are thought to be due to nephrotoxic effects on the tubular epithelium, leading to loss of function, apoptosis, and eventually, ...

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 ...

In the worlds of art and perception, there’s a phenomenon known as simultaneous contrast. It basically means that a color surrounding another may change the way the brain perceives the interior color.