Reflux esophagitis generally cannot be detected on a CT scan unless it is very severe, at which point it may be evident on a CT. Diagnosis of reflux esophagitis is primarily through gastroscope examination, where damage and erosion of the esophageal mucosa can be observed. Patients with severe reflux esophagitis may experience symptoms such as acid reflux, heartburn, and a burning sensation behind the sternum. Additional diagnostic methods include upper gastrointestinal barium meal imaging and tissue pathology biopsy. An electrocardiogram can also be performed to rule out the possibility of conditions such as angina.