Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were obtained . There are persistent low lung volumes with streaky bibasilar atelectasis . There is stable top - normal heart size . The mediastinal contours are normal . No focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . No evidence of pneumonia .