Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and mediastinal clips are noted . Mild left basal atelectasis is noted . Otherwise the lungs are clear . No large effusion or pneumothorax . No signs of congestion or edema . 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 .