Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chain suture projects over the right upper hemithorax . There is persistent linear atelectasis in the left mid lung and worsening atelectasis at the left base . Opacity projecting just anterior to the spine at the lung base on the lateral radiograph is not appreciably changed since ___ . There is no airspace opacity worrisome for pneumonia . The cardiomediastinal silhouette and hilar contours are stable . The heart is not enlarged . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Increase , mild atelectasis at the left base but no convincing evidence of pneumonia .