Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are moderately well inflated . Retrocardiac density is more prominent than on the previous study representing either atelectasis or early consolidation . Small left effusion is present and there may be a tiny right effusion . Aortic arch calcification is present . The heart is not enlarged . The osseous structures are normal for age . Monitor leads overlie the chest .
    OUTPUT:
    
Increasing retrocardiac density worrisome for atelectasis or early consolidation . Small left pleural effusion is again noted .