Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior examinations , there is no acute interval change . There are no new focal opacifications concerning for pneumonia . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are stable , demonstrating mild cardiomegaly . Pulmonary vascularity is not increased .
    OUTPUT:
    
No acute cardiopulmonary process .