Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates mildly hyperinflated clear lungs with flattening of the diaphragms . No focal opacity . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the osseous structures are within normal limits and upper abdomen is unremarkable .
    OUTPUT:
    
Findings consistent with COPD . No pneumonia .