Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral chest radiograph demonstrate an enlarged heart , stable since prior examination dated ___ . No focal opacity convincing for no pneumonia is identified . There is no overt pulmonary edema . Blunting of bilateral costophrenic angles may reflect small pleural effusions . Slight rightward deviation of the trachea is thought secondary to tortuous aorta , stable since prior examination . No acute osseous abnormality is identified .
    OUTPUT:
    
Mildly enlarged heart without evidence of overt pulmonary edema or pneumonia .