ARRT Patient Care Practice Exam

Which anatomic structures require ingestion of barium sulfate suspension for radiographic demonstration?

1. Duodenum only

2. Duodenum and pylorus only

3. Pylorus and ilium only

4. Duodenum, pylorus, and ilium

The correct answer is: Duodenum and pylorus only

The ingestion of barium sulfate suspension is primarily indicated for the visualization of specific structures within the gastrointestinal (GI) tract during radiographic examinations. Barium sulfate acts as a radiopaque contrast agent that enhances the visibility of soft tissues, allowing for better imaging. In this context, the duodenum and pylorus are significant structures that can be effectively demonstrated with barium studies. The duodenum, being the first part of the small intestine immediately following the stomach, and the pylorus, which is the opening from the stomach into the duodenum, are best visualized together because they are functionally and anatomically linked. While the ilium is also an important part of the small intestine, it is not typically highlighted in conjunction with the swallowing of barium sulfate, especially in standard studies focused on the upper GI tract. This is why the combination of the duodenum and pylorus is specifically emphasized, as they both contribute to the processes of digestion and nutrient absorption, making them critical targets for assessment in radiographic studies. Thus, the ingestion of barium sulfate suspension is effective for visualizing the duodenum and pylorus, which is reflected in the correct answer choice.