Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle opacity projecting over the anterior mid lung on the lateral view is not well substantiated on the frontal view and could be due to atelectasis , although early / very subtle consolidation is not excluded in the appropriate clinical setting . . There is no pleural effusion or pneumothorax . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
Subtle opacity projecting over the anterior mid lung on the lateral view is not well substantiated on the frontal view and could be due to atelectasis , although early / very subtle consolidation is not excluded in the appropriate clinical setting .