Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear and well expanded bilaterally with no areas of focal consolidation , masses , lesions , pleural effusion , or evidence of pneumothorax . The cardiomediastinal silhouette demonstrates a mildly tortuous aorta but otherwise is normal in appearance . The pleural surfaces are unremarkable .
    OUTPUT:
    
No evidence of pulmonary infection or malignancy .