Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is ___focal opacity ___ the left lung base , not seen on ___ . Aortic atherosclerosis and mild cardiomegaly are unchanged . There is no pleural effusion or pneumothorax . There is ___ area of linear atelectasis ___ the right lung base .
    OUTPUT:
    
Left lower lobe pneumonia likely representing aspiration . The results were relayed by Dr . ___ to Dr . ___ by phone ___ 12 :01 p .m . on ___ .