Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy lingular opacity is most likely due to atelectasis although early infectious process is not excluded in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
Subtle patchy lingular opacity most likely due to atelectasis , less likely early consolidation .