Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persisting chronic right basilar atelectasis , and possible small pleural effusion appear unchanged compared to prior studies . Pleural thickening on the right is unchanged . Retrocardiac opacity on the left has worsened since the prior study , and is worrisome for pneumonia or aspiration in the appropriate clinical setting . There is no overt pulmonary edema . There is no pneumothorax . The heart size is stable .
    OUTPUT:
    
Right bibasilar atelectasis and possible small effusion stable . Worsening retrocardiac left basilar opacity , concerning for aspiration or pneumonia in the appropriate clinical setting