Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . There is no pleural effusion or pneumothorax . There is a small nodular density projecting over the left lower lung , probably due to scarring or potentially a nipple shadow , but a true pulmonary nodule is not excluded . Otherwise , the lungs appear clear . Bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease . Nodular focus projecting over the left lower lung . When clinically appropriate , a chest CT is suggested to evaluate further . An email regarding the recommendation was sent to the ED QA nursing group on ___ .