Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . The heart is mildly enlarged , not significantly changed . The lungs are clear . The mediastinal contours are normal . There are no definite pleural effusions . No pneumothorax is seen . Note is made of bilateral healed rib fractures .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Unchanged mild cardiomegaly .