Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The lungs are mildly hyperexpanded with flattened diaphragms and slightly increased AP diameter . There is no suspicious mass , focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
1 . Mild hyperexpansion . 2 . No pneumonia or suspicious lesions .