Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest shows an unchanged right subclavian central venous line with the tip in the mid SVC . There are no areas of increased air space opacity . The chronic right upper lobe opacity is slightly improved since the prior radiograph . The cardiac and mediastinal contours are normal . No pleural abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary process .