Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Rightward deviation of the trachea due to the patient 's known aortic arch aneurysm is noted . The hilar and cardiomediastinal contours are otherwise normal . There is no pneumothorax or pleural effusion . Pulmonary vascularity is normal . The ICD and its lead are in the expected location .
    OUTPUT:
    
1 . Mass effect on the trachea due to the aortic arch aneurysm , better appreciated by CT . 2 . Otherwise , normal radiograph of the chest .