Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is normal . The mediastinal and hilar contours are unremarkable . No overt pulmonary edema is demonstrated . Patchy right basilar opacity likely reflects atelectasis . Known emphysematous changes are better assessed on the previous CT . No focal consolidation , pleural effusion or pneumothorax is present . Multilevel degenerative changes in the thoracic spine are re - demonstrated . Right humeral head prosthesis and intramedullary rod within the left humerus are partially visualized . Remote healed right rib fractures are re - demonstrated .
    OUTPUT:
    
Mild right basilar atelectasis .