Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , which limits assessment of lung bases . The cardiac silhouette size is difficult to assess given the low lung volumes , but is likely within normal limits . The mediastinal and hilar contours are unremarkable . Streaky opacities in lung bases likely reflect atelectasis , with no pleural effusion or pneumothorax identified . There is no pulmonary vascular engorgement . Clips are seen in the right upper quadrant of the abdomen . Degenerative changes of the right glenohumeral joint are noted . No free air is noted under the diaphragms .
    OUTPUT:
    
Low lung volumes limits the assessment of the lung bases . Probable bibasilar atelectasis . No free air is seen under the diaphragms .