Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Inspiratory volumes are low . This likely accounts for slight prominence of the cardiomediastinal silhouette and pulmonary vasculature . There is upper zone redistribution , without overt CHF . There is some patchy opacity at both lung bases , more pronounced on an outside scanned - in film from ___ dated ___ . The differential includes atelectasis versus early pneumonic infiltrate . No gross effusion . No pneumothorax detected .
    OUTPUT:
    
New patchy opacity at both lung bases common question atelectasis . Early infectious infiltrate or area of aspiration can not be excluded .