Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Distended esophagus unchanged . Surgical clips in relation to the gastroesophageal junction . Prominent heart size unchanged . The known loculated left - sided pleural effusion appear slightly decreased in size compared to prior . Slightly improved aeration of the left lung . No left pneumothorax . No new right lung airspace opacification .
    OUTPUT:
    
The known loculated left - sided pleural effusion as well as aeration of the left lung shows mild interval improvement .