why do we see a deuodenal cap in barium meal skiagrams?

Question

why not the other parts...if its the mesentry thats attached how does it affect the visibility?

Answer 1

The duodenum is the portion of the small bowel just beyond the stomach. The first part is called the cap because on x-ray it looks a bit like a cap. This cap like appearanceis because the next part takes an acute C shaped curve.