Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . There is a somewhat spiculated margin along the right mediastinal contour at the level of the aortic arch . The right hilum appears pole to cranial knee by this to a lesser extent cysts also seen on the left . Pulmonary vascular is normal . Lungs are clear . There are no pleural effusions . Is some biapical scarring in the lungs bilaterally .
    OUTPUT:
    
1 . Contour abnormality of the mediastinum likely represents radiation change . Comparison with prior outside study is needed to confirm stability of this finding . Alternatively this could be further evaluated with chest CT . 2 . No acute intrathoracic process . No evidence of pneumonia .