Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . This causes accentuation of the cardiac silhouette size which is mildly enlarged . The mediastinal contour is slightly widened superiorly and this is likely due to low lung volumes . No pulmonary edema is seen though there is crowding of the bronchovascular structures as a result of low lung volumes . Hilar contours are normal . Minimal streaky bibasilar opacities likely reflect atelectasis . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities detected . No free air is noted under the diaphragms .
    OUTPUT:
    
No subdiaphragmatic free air . Low lung volumes with bibasilar atelectasis .