Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to prior , there is mild decrease in lung volume , especially on the left likely from mild atelectasis . Small pleural effusion on the right is possible . The heart appear mildly enlarged , accentuated due to decreased lung volumes . Right - sided port appear unchanged from prior . Aortic knob calcification is again seen , unchanged . No pneumoperitoneum is seen .
    OUTPUT:
    
1 . No pneumoperitoneum . 2 . Small right pleural effusion and bibasilar atelectasis .