Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest radiograph demonstrates intact median sternotomy wires , two right chest tubes in appropriate positions with tips at the right apex and right cardiophrenic angles . Persistent low lung volumes with bibasilar atelectasis and stable heterogeneous right lower lobe opacity . Stable small right pleural effusion . No left pleural effusion . Pleural opacities are stable . No pneumothorax . No subpulmonic pneumothorax . Heart size is limited in evaluation due to overlying parenchymal and pleural abnormality . Limited assessment of the upper abdomen is within normal limits .
    OUTPUT:
    
1 . No interval change over the past 10 hours . No subpulmonic pneumothorax . 2 . Stable small right pleural effusion with stable pleural and parenchymal opacities most consistent with postsurgical changes .