Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is mild left basal atelectasis . Otherwise the lungs are clear . No large effusion , pneumothorax , edema or congestion . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild left basal atelectasis , otherwise unremarkable exam .