Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes persist . New since the prior study is interstitial opacity over the right lung worrisome for asymmetric pulmonary edema or infection . Right base atelectasis is seen . No large pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are grossly stable . The right colon is again interposed anterior to the liver .
    OUTPUT:
    
New opacity projecting over the left lung could be due to very asymmetric pulmonary edema although more concerning for infectious or inflammatory process .