Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are no new lung opacities . Right lower lobe lung nodule measuring 8 mm is stable since the CT scan of ___ . Biapical post-radiation changes are also chronic . Mediastinal and cardiac contours are stable . There is no pneumothorax or pleural effusion . Fusion between the posterior arch of the sixth and seventh right ribs is congenital .
    OUTPUT:
    
There is no significant change since prior exam . There is no pneumonia .