Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates persistent moderate left pleural effusion with retrocardiac opacity and decreased left lower lobe atelectasis . Persistent right lower lobe opacity with trace right pleural effusion . Mild vascular engorgement noted . Stable appearance of tracheostomy . Limited evaluation of heart size due to underlying lung abnormality . No pneumothorax . Mediastinal contour , and hila are unremarkable . Limited assessment of the upper abdomen is within normal limits . Degenerative changes of the thoracolumbar spine are noted .
    OUTPUT:
    
1 . Stable moderate left pleural effusion with retrocardiac opacity likely representing combination of pleural fluid and atelectasis however differential includes pneumonia in the appropriate clinical setting . 2 . Decreased left lower lobe atelectasis . 3 . Persistent right lower lobe opacity with small right pleural effusion is most consistent with atelectasis however differential includes pneumonia or aspiration pneumonia in the appropriate clinical setting . 4 . Mild vascular engorgement .