Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . There is prominence of the ascending aorta , unchanged from prior examinations . Linear opacity at the left lung base has resolved . There are no new focal consolidations . Previously identified ___ mm left lung base nodular opacity is no longer identified , likely obscured by the nipple marker , suggesting it most likely represented a nipple shadow . There are no pleural effusions or pneumothorax . Osseous structures are grossly intact .
    OUTPUT:
    
No radiographic evidence of an acute cardiopulmonary process .