Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of normal size with normal cardiomediastinal contours . Small lingular opacity is compatible with atelectasis or an epicardial fat pad , though an infiltrate is not excluded in the appropriate clinical setting . No pleural effusion or pneumothorax . No radiopaque foreign body .
    OUTPUT:
    
Small lingular opacity , compatible with atelectasis , although infiltrate is not excluded in the appropriate clinical setting .