Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are symmetrically inflated and clear . No pleural effusion , pneumothorax , or pneumomediastinum . Heart size , mediastinal contour , and hila are unremarkable . No evidence of radiopaque foreign body within the airway or esophagus . Visualized upper abdomen is unremarkable . Stable calcified left thyroid nodule noted with thyroid goiter . Aortic arch calcifications noted .
    OUTPUT:
    
1 . No radiopaque foreign body within the airway or esophagus . 2 . Normal chest radiograph . 3 . Thyroid goiter , similar to previous examination .