Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are not enlarged . There is bibasilar atelectasis , but no focal consolidation or pulmonary edema / heart failure . There is no pleural effusion or pneumothorax . Rounded 5 .5 mm density over left upper chest laterally may represent a bone island or granuloma .
    OUTPUT:
    
Low lung volumes with no acute cardiopulmonary process .