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 . Patchy calcification is noted along the aortic arch . There is no pleural effusion or pneumothorax . Projecting over the right lower lung is a nodular density measuring about 8 mm in diameter superimposed on background bronchovascular structures , raising concern for a nodule , although a nipple shadow is suspected . Slight degenerative changes are noted along the lower thoracic spine .
    OUTPUT:
    
1 . No evidence of acute disease . 2 . Nodular focus projecting over the right lower lung , possibly a nipple shadow . However , when clinically appropriate , follow up repeat PA view with nipple markers is recommended for confirmation and further assessment .