Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Tracheostomy tube remains in stable position . There are bibasilar opacities again seen , potentially due to atelectasis or scarring , noting that infection can not be entirely excluded . Chronic elevation of the right hemidiaphragm is again seen . There is no large effusion . Moderate cardiac enlargement is again seen as well as atherosclerotic calcifications at the aortic arch . There is no free intraperitoneal air . No acute osseous abnormality is identified .
    OUTPUT:
    
Bibasilar opacities , potentially atelectasis or scarring , noting that infection can not be entirely excluded .