Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is mildly enlarged and has slightly increased compared to prior studies . Enlarged central pulmonary vasculature appears stable compared to prior radiographs . Known lung nodules in the superior segment of the right lower lobe and in the lingula are again demonstrated and appear similar to prior studies . They were reportedly FDG negative on prior PET - CT of ___ . Minimal bibasilar scarring appears unchanged as well as multiple healed left rib fractures .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Well - circumscribed lung nodules in the right lower lobe and lingula appear similar to prior radiographs since ___ and were not avid on prior PET - CT study . This is highly suggestive of a benign etiology such as a hamartoma or non-calcified granulomas .