Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has had prior median sternotomy with aortic valve replacement . Sternotomy wires are intact and aligned . Minimal bibasilar subsegmental atelectasis is unchanged . The lungs are otherwise clear . There is no pneumothorax . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Minimal bibasilar subsegmental atelectasis with otherwise clear lungs .