@Mountaindewed During the test you drink barium and they watch it go down on xrays. It shows if there is a narrowing on the way down. I'm having it because I've had symptoms of stricture for a long time and if I have one they can stretch it during my EGD. I just dread it because I've had barium before and am not a fan (as if anyone likes it ). It's sometimes (I think usually actually) called a barium swallow.