Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is obscuration of the right heart border of with opacification of the lower half of the right hemithorax . Compared with the prior chest x-ray , the right pleural effusion has increased . Streaks of atelectasis at the left lung base are improved from before . Osseous structures unremarkable .
    OUTPUT:
    
Compared with the prior chest x-ray , there has been interval worsening of the right pleural effusion , with continued opacification of the lower half of the right hemithorax .