Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and cardiac valve replacement . The previously seen areas of atelectasis have improved , with now only minimal atelectasis at the lung bases . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable . The hilar contours are also unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .