Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously noted right basilar opacity has increased and likely represents increase atelectasis , perhaps due to aspiration . Left basilar opacity appears stable and likely a combination of small pleural effusion and adjacent atelectasis . Upper lung ___ are clear . Tracheostomy is noted in place .
    OUTPUT:
    
Increased right basilar opacity , likely representing atelectasis and perhaps due to aspiration . An overlying infectious process must be excluded in the proper clinical setting . Otherwise little change with stable left basilar opacity suggesting a small left pleural effusion and atelectasis .