Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrate symmetrically hyperexpanded lungs with flattening of bilateral hemidiaphragms which may reflect COPD . Linear opacities within the right middle lobe likely reflect atelectasis . No focal opacity is seen concerning for infection . The cardiac and mediastinal contours are unremarkable . There is no pleural effusion or pneumothorax . Visualized osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
No focal opacity concerning for pneumonia is identified . Hyperexpanded lungs with bilateral flattening of hemidiaphragms is suggestive of chronic obstructive pulmonary disease .