Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are well expanded and clear . The cardiomediastinal silhouette is unremarkable . No focal opacity , pleural effusion , pulmonary edema or pneumothorax is present . No obvious rib fracture or displacement is identified .
    OUTPUT:
    
No acute cardiopulmonary process .