Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been a slight interval increase in pulmonary vascular congestion without frank interstitial edema . There is bibasilar atelectasis . There is no pneumothorax . There are no pleural effusions . There are no focal consolidations . There is a left - sided chest tube which abuts the mediastinum . The heart size is top normal .
    OUTPUT:
    
No evidence of a pneumothorax .