Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is not substantially changed from the previous exam . The mediastinal and hilar contours are similar . No pulmonary edema is identified . Ill - defined opacification within the left lung base remains similar to the previous study likely reflecting a combination of small pleural effusion and atelectasis though infection is not excluded . Trace right pleural effusion is also likely present along with probable mild right basilar atelectasis . No pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
Continued left basilar patchy opacity likely reflecting a combination of atelectasis and small left pleural effusion though infection is not excluded . Small right pleural effusion with mild right basilar atelectasis also noted .