Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal contours are unchanged . An endotracheal tube terminates 5 .6 cm above the carina . There is no pneumothorax . The previously seen right basilar opacity appears more veil - like on the current supine examination , and may represent an effusion . Persistent left retrocardiac opacity likely reflects atelectasis .
    OUTPUT:
    
1 . Persistent right basilar opacity is less defined on this supine radiograph , and may reflect pleural effusion rather than focal consolidation . 2 . Unchanged left retrocardiac opacity .