Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal , unchanged . The tortuous aorta is also unchanged . Lungs are clear without effusion , pneumothorax , or focal consolidation concerning for pneumonia . An opacity projecting over the heart on the lateral view is unchanged since ___ and is likely an extensive fat pad .
    OUTPUT:
    
No evidence of pneumonia .