Small bowel barium study (normal pattern)
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General appearance of the small bowel in a follow-through. Lack of overlapping loops allows to delineate mesenteric layers between them.
Barium radiograph of Prof. Saeed Rad, Tabriz, Iran
Despite advanced cross-sectional imaging, barium study of the small intestine (including small bowel follow through) is still a viable means to show the bowel loops in a cost effective way, and is often an excellent way to image the small bowel mucosa.
The jejunum is located on the left side and ileum in lower abdomen, to be continued by colon in the ileo-caecal region. This must be shown in any series of the small intestine.
There is no definite border between jejunum and ileum, but the most of the small bowel consists of ileum.
The mucosa of the small bowel is characterized by the connivent valves (also called Kerkrin or circular valves). These start from the second part of the duodenum, which has the largest number of them, decreasing in number as the small bowel approaches the the ileocaecal valve.