Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The cardiac , mediastinal and hilar contours are unremarkable . Atelectatic changes are noted in the lung bases . There is mild elevation of right hemidiaphragm which appears unchanged . No focal consolidation , pleural effusion or pneumothorax is seen . There is no evidence of pulmonary vascular congestion . Diffuse osseous sclerotic metastases are unchanged .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .