Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal contours demonstrate a tortuous aorta . An air - fluid level in the upper esophagus likely reflects esophageal contents . The lungs are clear of consolidation . Flattened hemidiaphragms and a large AP distance are compatible with chronic obstructive pulmonary disease . There is no large pleural effusion or pneumothorax . A lower thoracic wedge deformity is stable compared to the ___ study .
    OUTPUT:
    
Air - fluid level in the upper esophagus but no acute cardiopulmonary process .