Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . Fullness in the aortopulmonic window fo the mediastinum is unchanged since ___ , and does not warrant further investigation . The cardiomediastinal and hilar contours are otherwise normal . There are no pleural effusions , pneumothorax , or pneumomediastinum . No free air is seen under the diaphragm . Old healed right posterior eighth rib fracture is present .
    OUTPUT:
    
No acute cardiopulmonary process . No pneumoperitoneum