Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior examination mild interstitial edema has improved . There are no focal opacities concerning for pneumonia . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are normal . Pulmonary vascularity is normal . A right subclavian approach central venous catheter tip projects within the mid SVC .
    OUTPUT:
    
No acute cardiopulmonary process .