Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are fully expanded and clear . Cardiomediastinal and hilar contours are within normal limits . There is no pleural effusion or pneumothorax . The mid esophagus is mildly distended with air , not necessarily clinically significant .
    OUTPUT:
    
Normal chest radiograph . Although no fracture is seen , conventional chest radiographs are not sensitive for detection of chest cage trauma . Regions where there are focal findings of possible trauma should be clearly marked and imaged with bone detail views .