Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities . Midline air filled structure projects over the cervical trachea , and may reflect a markedly distended esophagus with air - fluid level .
    OUTPUT:
    
Midline air filled structure projecting over the trachea , potentially a dilated esophagus with air - fluid level . Lateral view of the chest is recommended for further assessment . Otherwise , no acute cardiopulmonary abnormality .