Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . A dual - lead pacemaker / ICD device appears unchanged with leads again terminating in the right atrium and ventricle , respectively . There is patchy left basilar opacity , also obscuring the left lateral costophrenic sulcus , but somewhat decreased . Elsewhere , the lungs remain clear . There are no pleural effusions or pneumothorax . Small osteophytes are present throughout the visualized thoracic spine .
    OUTPUT:
    
Improving left basilar atelectasis .