What type of radiographic examination assesses the gastrointestinal tract?

The upper GI series is a specific radiographic examination designed to visualize the upper portion of the gastrointestinal tract, which includes the esophagus, stomach, and the beginning of the small intestine (duodenum). This examination typically involves the ingestion of a contrast medium, usually barium, which outlines these structures and enhances their visibility on X-ray images.

The upper GI series is particularly useful for diagnosing various conditions, such as ulcers, tumors, and structural abnormalities within the upper digestive system. By providing clear images of how these organs function and their morphology, healthcare providers can make informed decisions regarding further diagnostics or treatment.

In contrast, an X-ray of the abdomen may visualize gas patterns and some solid structures but does not provide detailed evaluation of the gastrointestinal tract specifically. A CT scan of the pelvis primarily focuses on the lower abdominal area and may include some evaluation of the GI tract, but it is not specific to assessing the upper GI system. The lower GI series, also known as a barium enema, focuses on the lower portion of the gastrointestinal tract, including the colon and rectum, rather than the upper GI structures.