Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Both lungs are well expanded without any opacities concerning for pneumonia or aspiration or pulmonary edema . There is no evidence of mediastinal or hilar lymphadenopathy . Heart size is normal . There is no pleural abnormality .
    OUTPUT:
    
Clear lungs . No evidence of mediastinal or hilar lymphadenopathy .