Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Two subtle adjacent areas of patchy opacity projecting over the left upper lung could be sites of infection . Additionally , projecting over the posterior lower lung bases posteriorly , there is subtle opacity which could be due to atelectasis or consolidation , no definite correlate on the frontal view . There is no pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Two subtle areas of opacity projecting over the left upper lung may be sites of infection , correlate to see if there is any external artifact that could be in that area . Additional subtle focal opacity projecting over the posterior lung bases on the lateral view without a clear correlate on the frontal view , may be due to atelectasis ; however , consolidation or infection is not excluded in the appropriate clinical setting . The above findings were discussed with Dr . ___ on ___ at 5 :50 p .m .