Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Persistent opacification of the right hemithorax with associated volume loss is consistent with the prior history of right pneumonectomy . The left lung is clear without focal consolidation , pleural effusion or pneumothorax . Heart size is not reliably evaluated with normal appearance of the left mediastinal border .
    OUTPUT:
    
No acute intrathoracic process with unchanged postsurgical changes .