Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is platelike atelectasis in the lower lungs bilaterally . There is no evidence of pneumonia or CHF . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Bibasilar platelike atelectasis . No definite signs of pneumonia .