Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The heart remains mildly enlarged with left ventricular predominance . The mediastinal and hilar contours are stable , with the aorta demonstrating mild tortuosity . There is crowding of the bronchovascular structures but no overt pulmonary edema is present . Mild bibasilar atelectasis noted , without focal consolidation . No pleural effusion or pneumothorax is visualized . Old right - sided rib fractures are present .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .