Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes seen on the current exam with secondary bibasilar atelectasis . The lungs are otherwise clear . The heart is top - normal in size . The mediastinal contours are stable . There is mild bibasilar atelectasis . No pleural effusion , pulmonary edema , pneumothorax , or focal consolidation is seen . No subdiaphragmatic free air is noted .
    OUTPUT:
    
No acute cardiopulmonary process or subdiaphragmatic free air .