Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen opacity in the right upper lobe is decreased and left perihilar opacity unchanged compared to prior study from ___ . No pleural effusion or pneumothorax is seen . Moderate cardiomegaly is unchanged . The aorta is tortuous . Postsurgical clips are noted .
    OUTPUT:
    
1 . Decreased right upper lobe opacity may represent resolving pneumonia and / or radiation changes . 2 . Unchanged left perihilar opacity may represent radiation changes . 3 . Stable moderate cardiomegaly .