Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear and well expanded bilaterally with no masses , lesions , areas of focal consolidation , pleural effusion , or evidence of pneumothorax . The cardiomediastinal silhouette is unchanged and within normal limits . The pleural surfaces are unremarkable .
    OUTPUT:
    
Normal chest x-ray with no evidence of malignancy or infection .