Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , lung volumes have decreased and there is bibasilar atelectasis . There is no pleural effusion , focal consolidation or pneumothorax . A left chest pacemaker with leads terminating in the right atrium and right ventricle is seen . The cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . No pleural effusion .