Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are grossly clear ; a vague opacity over the left lung base has no correlate on lateral radiograph . Cardiomediastinal silhouette and hilar contours are unremarkable . No pneumothorax or pleural effusion is seen . The bones are intact .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormality .