Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle left basilar opacity is seen , not seen on the lateral view could be due to atelectasis ; however , an early mild infectious process is not excluded in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are stable and unremarkable .
    OUTPUT:
    
Subtle patchy left basilar opacity could be due to atelectasis , although in the appropriate clinical setting , consolidation is not excluded .