Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiomediastinal silhouette , hilar contours , and pleural surfaces are normal . No pneumothorax , pleural effusion , pneumonia , or pulmonary edema . A small focal opacity projecting over the left hemidiaphragm is likely a nipple shadow .
    OUTPUT:
    
No evidence of acute tuberculosis .