Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided pigtail catheter is again visualized . The right effusion is slightly decreased . There is a dense alveolar infiltrate central greater than peripheral . The left upper lung shows some patchy areas of infiltrate . There is left lower lobe volume loss / infiltrate that is increased compared to prior
    OUTPUT:
    
Some improvement in the aeration on the right but worsened appearance on the left