In infants, where are 24-hour images performed to demonstrate gastroesophageal reflux?

When assessing gastroesophageal reflux in infants using nuclear medicine imaging, 24-hour dynamic studies are performed particularly to visualize the lung fields. This is because the primary concern with gastroesophageal reflux disease (GERD) in infants is not just the reflux itself, but also the potential aspiration of gastric contents into the airways, which can lead to respiratory complications.

The 24-hour imaging protocol helps to capture reflux events over a prolonged period, allowing the clinician to evaluate the occurrence of reflux and determine whether the contents have reached the respiratory system. Aspiration can lead to respiratory distress or other complications, making it essential to observe the lung fields for signs of aspiration pneumonia or other lung-related issues.

The other locations mentioned do not directly pertain to the primary interests of evaluating gastroesophageal reflux in infants. While the diaphragm plays a role in the respiratory process, it is not a specific target for imaging in this scenario. The abdominal area may help visualize the stomach and esophagus, but it doesn’t provide information about respiratory complications. Similarly, the chest is too broad a term and doesn't specify the focus on the lungs that is critical for assessing potential aspiration.