Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild tortuosity of the thoracic aorta . Hilar contours are unremarkable . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . No definite fracture is identified . A fluid level is identified in the upper portion of a dilated esophagus .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . No definite fracture . Please note that conventional radiography is limited for evaluation of chest wall trauma . 2 . An air fluid level is present within the upper aspect of a dilated esophagus which is suggestive of achalasia or esophageal diverticulum and was present on prior study . Recommend further characterization with an upper GI barium study or CT . Impression item # 2 was emailed to the ED QA Nursing staff .