Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates mildly hyperinflated clear lungs . Blunting of costophrenic angles are stable and may represent trace pleural effusion / pleural thickening . No pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumonia .