Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear , without focal opacities . Small focus of loss of the right heart margin , right below the cardiomediastinal angle is likely due to a hilar vessel abutting the right cardiac margin and is unchanged compared with multiple prior radiographs as far back as ___ . Cardiomediastinal and hilar contours are unremarkable . The aorta is tortuous . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .