Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated , without focal opacities . Mild - to - moderate cardiomegaly is not significantly changed compared with prior exam . The aorta is tortuous but otherwise the cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .