Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is platelike left basal atelectasis . Otherwise the lungs appear clear . Cardiomediastinal silhouette is normal . No large effusion or pneumothorax . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No convincing evidence for pneumonia . Mild left basal platelike atelectasis .