Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is elevation of the right hemidiaphragm . Low lung volumes are present with bibasilar atelectasis . There is no evidence of pneumothorax or pleural effusions . No evidence of pneumonia . The heart is normal in size . There is slight tortuosity of the thoracic aorta . Osseous structures are grossly unchanged .
    OUTPUT:
    
Bibasilar atelectasis without acute intrathoracic process .