Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate hyperinflated lungs with flattened diaphragms . Heart is normal in size . Cardiomediastinal silhouette is unremarkable . Lungs are clear . No pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Probable COPD .