Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small bilateral pleural effusions are seen , and no focal consolidation or pneumothorax is visualized . Reticular nodular pattern persists , and has been better characterized on the previous CT scan . The tracheostomy tube is midline . The cardiac and mediastinal contours are normal , and diffuse subcutaneous air is improving .
    OUTPUT:
    
No pneumothorax visualized .