Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph provided . Midline sternotomy wires and mediastinal clips are noted . There is mild bibasilar atelectasis . No definite signs of pneumonia or CHF . Cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
No acute findings in the chest . Mild bibasilar atelectasis . Multiple mediastinal clips are noted .