In the AP recumbent position of the stomach, where will barium typically be located?

• A. Pylorus
• B. Body
• C. Fundus
• D. Duodenum

Answer: (C)

In the AP recumbent position of the stomach, barium typically fills the fundus due to the natural anatomy and the influence of gravity on the liquid contrast agent. When a patient is positioned supine, as is the case in the AP recumbent positioning, the barium, being denser than the surrounding structures, will gravitate toward the upper part of the stomach, which is the fundus. This area is located above the level of the pylorus and body of the stomach, allowing it to retain the barium effectively in this position.

In a supine position, the barium can be seen outlining the walls of the fundus, demonstrating the anatomy of the stomach more clearly for radiographic evaluation. This location is significant for radiologists when assessing for conditions such as ulcers or other abnormalities in the upper gastrointestinal tract. Understanding the positioning and the corresponding anatomy helps in interpreting imaging findings accurately.