Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There are low lung volumes . There is patchy opacity at both bases , which presumably represents atelectasis . No frank consolidation . There is no chf , pleural effusion , or pneumothorax . The cardiomediastinal and hilar contours are within normal limits . No free air seen beneath the diaphragms . No rib fracture identified on these lung - technique films .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Otherwise , no acute pulmonary process identified .