Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . No pleural effusion or pneumothorax . Stable mild cardiomegaly . There is a persistent lobular contour along the right hilum . Mediastinal contour is otherwise unremarkable . Two clips are again seen along the upper hemithorax . Left posterior fifth rib has been resected .
    OUTPUT:
    
1 . Persistent lobular contour to the right hilum may represent the right pulmonary artery however mediastinal lymphadenopathy would be similar in appearance . 2 . No pneumonia .