Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low which accentuates the size of the cardiac silhouette which appears at least mildly enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Streaky bibasilar opacities likely reflect areas of subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is clearly visualized . No subdiaphragmatic free intraperitoneal gas is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes of bibasilar atelectasis . No subdiaphragmatic free air .