Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The aortic arch is calcified . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . There is a nodular focus projecting over the right lower lung , probably a nipple shadow , although not visualized on prior radiographs . Otherwise the lung fields appear clear .
    OUTPUT:
    
1 . No evidence of acute disease . 2 . Newly apparent nodular focus projecting along the right lower lung , probably a nipple shadow , although a pulmonary nodule should be considered . When clinically appropriate , repeat PA view with nipple markers is recommended .