The role of radiological imaging in the inflammatory pathology of the esophagus is limited. For many years, barium swallow and endoscopic imaging have been the main way to evaluate the esophagus. These techniques are very useful for the evaluation of esophageal mucosal but they do not provide information about the extent of disease. On the other hand, thoracic CT is a noninvasive method that allows a sensitive study of the esophageal wall thickening as the most common manifestation of disease and a better study of the extraluminal manifestations. However, it is important to take into account that wall thickening is not a specific finding because other conditions such as esophageal carcinoma can also cause wall thickening and a collapsed esophagus can lead to a false diagnosis [1]. CT barium studies have been used traditionally to obtain a good distension but gas produced by effervescent granules offers an alternative to barium. Patients must take 7g of effervescent granules with a small amount of water immediately before scanning. Intravenous contrast is also needed in order to obtain an appropiate enhancement of the wall and antiperistaltic drugs are optional [2]. Postprocessed reconstructions are also crucial to make a more accurate diagnosis.