When a patient is supine, which part of the stomach is typically well-filled with barium?

When a patient is in the supine position, the anatomy of the stomach and how it interacts with the administered barium provides insight into which part of the stomach fills most effectively. In this position, the fundus, which is the uppermost portion of the stomach, tends to be well-filled with barium due to its position relative to gravity.

In the supine posture, the fluid—like barium—will seek the area of least resistance, which is typically the fundus since it is positioned above the rest of the stomach. This results in an effective collection of barium in the fundus, allowing for clearer imaging and assessment during radiographic examinations.

Other parts of the stomach, such as the body and pylorus, may not retain as much barium when the patient is supine. The body could be partially filled, but since it is not the highest point in the stomach, it will not have as much barium as the fundus. The pylorus, which is the passage from the stomach into the small intestine, is generally less filled with liquid barium in this position because it is located more toward the lower part of the stomach. The cardia, which is where the esophagus connects to the stomach,