Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . The aorta is calcified with mild unfolding . The heart appears normal in size . The lungs are clear . Blunting of each costophrenic sulcus is noted which makes tiny effusions possible , although the appearance may be due to scarring and does not appear changed . Right apical scarring with calcification appears similar .
    OUTPUT:
    
No definite acute disease . Blunting of costophrenic sulci , probably due to background scarring , although very small pleural effusions are not exluded .