Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to ___ , there is low lung volumes with marked elevation of the right hemidiaphragm . The asymmetric opacification of the left lung can be related to patient rotation . Tracheostomy and nasogastric tube are in similar position . No pneumothorax .
    OUTPUT:
    
Tracheostomy remains in good position . Low lung volumes with mild atelectasis , has not significantly changed .