Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded . Cardiac silhouette appears to be mildly enlarged ; however , this could be due to the AP technique . Cardiomediastinal contours are unremarkable . Lungs are clear . No pleural effusions and no pneumothorax . Bony structures are intact .
    OUTPUT:
    
Normal radiographic study of the chest .