Why is Barium used for the x ray test for GERD?

Sara asked: barium is used in a test for GERD (gastric esophageal reflux disorder) where the patient drinks barium. the barium coats the patients insides to give a better picture. Just wondering why barium specifically is used rather than something else? Thanks!Create a video blog…instantly.

Technorati Tags: Coats, gerd, X Ray