What Is an Upper GI Series? An upper GI series is a group of X-ray tests that look at your GI tract -- your food pipe (the esophagus), stomach, and the first part of your small intestine (the duodenum ...

An air contrast barium enema is a test for your colon. These days, doctors don’t use it as often to look for colorectal cancer. Instead, it’s more common to get a colonoscopy, which can find smaller ...

For some time, doctors have known that milk could be used as a way of highlighting the bowel for radiological studies. Now, a researcher at a New York hospital has pitted milk against commercially ...

Katharina M. Fromm relates how barium and its ores went from a magical, glowing species that attracted witches and alchemists to components in a variety of compounds that are key parts of modern life.