Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post left - sided fat within persistent small left - sided effusion and left basilar atelectasis . The right lower lobe appears better aerated . No new focal consolidation . No pulmonary edema . The cardiomediastinal and hilar contour is remarkable for a dilated ascending aorta better demonstrated on chest CT dated ___ . There is no pneumothorax .
    OUTPUT:
    
Improved aeration right lung . Persistent left atelectasis and effusion , unchanged .