Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained demonstrating clear well - expanded lungs without signs of pneumonia or CHF . Bilateral nodular opacities in the lower lungs are likely nipple shadows . No pleural effusion or pneumothorax . Heart and mediastinal contours appear normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No signs of pneumonia or CHF .