Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly is overall unchanged compared to the prior exam . Subtle increase in opacification at the right lung base may be secondary to atelectasis . There is mild left basilar atelectasis . The hilar and mediastinal contours are otherwise stable . There is no large pleural effusion . There is no evidence of pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No convincing signs of aspiration .