Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the most recent exam yesterday evening , the left lower lobe atelectasis has increased , returning to its previous appearance on the exam yesterday morning . The right lower lobe atelectasis and new right upper lobe linear atelectasis are essentially unchanged from the most recent exam . Otherwise , no significant change in the mediastinal contour , elevation of left hemidiaphragm , and right chest wall subcutaneous emphysema . No pneumothorax . Small bilateral pleural effusions .
    OUTPUT:
    
Interval worsening of left lower lobe atelectasis . Small bilateral pleural effusions .