Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior chest radiograph , there is significant interval worsening of the left sided pleural effusion with associated moderate to severe atelectasis . The aerated left lung is otherwise unremarkable . No focal opacities are seen in the right lung . Blunting of the right pleural sulcus is compatible with a small right - sided pleural effusion which is slightly improved from ___ . The right hilus is unremarkable . The left hilus and left heart border are obscured by the large opacity in the left hemithorax . Sternotomy wires appear intact . Surgical clips in the right upper quadrant may be from prior cholecystectomy .
    OUTPUT:
    
1 . Significant interval worsening of left sided pleural effusion with concurrent moderate to severe atelectasis . 2 . No focal parenchymal opacities in the aerated lungs to suggest pneumonia . 3 . Interval improvement of small right - sided pleural effusion .