Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Complete opacification of the left hemithorax status post left pneumonectomy is unchanged . Volume loss with mediastinal shift to the left is stable . Pleuroparenchymal opacity at the right apex has slightly improved compared to the prior examination . No pneumothorax is seen . Heart size can not be accurately assessed .
    OUTPUT:
    
1 . Stable changes of left pneumonectomy . 2 . Persistent pleuroparenchymal opacity at the right apex with slight interval improvement .