Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest shows interval improvement of lung ventilation for reduced collapse of the left lung after extubation . Right hemidiaphragm is still significantly elevated compared to the contralateral with linear opacity at the right lung base likely due to atelectasis . Heart size is still mildly enlarged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Improved ventilation for reduced left lung collapsed after extubation . Persistent asymmetric elevation of the right hemidiaphragm with right lung base atelectasis .