Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate unfolding of the thoracic aorta . The heart is mild - to - moderately enlarged , as before . There is a patchy new opacity obscuring the left heart border , which is probably within the lingula and may represent a small focus of pneumonia . It was not present on the prior examination but is small . Nipple shadows are visualized bilaterally . There is also a very small pleural effusion suspected on the right side , seen in both views . Mild degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Patchy new lingular opacity suggesting a small focus of pneumonia . Trace suspected right - sided pleural effusion .