How does barium sulfate work in enhancing the visibility of certain tissues during medical imaging procedures?

Barium sulfate is a contrast agent that is not absorbed by the body and appears white on X-rays. When ingested or injected into the body, it coats the lining of the digestive tract or blood vessels, making them stand out more clearly on imaging scans. This helps healthcare providers to better visualize and diagnose any abnormalities or conditions in these tissues.