Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the chest x-ray of the same day at 12 :36 , there has been interval increase in opacification of the right lower lobe , compatible with a combination of increased atelectasis and pleural effusion , suspicious for pneumonia . Right upper lobe and left lung are still clear . Heart size is still moderately enlarged , with aorta mildly elongated . There is no left pleural effusion or pneumothorax .
    OUTPUT:
    
Increased opacification of the right lung base is likely a combination of pleural effusion and atelectasis , suspicious for pneumonia .