Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The proximal port of the right subclavian hemodialysis catheter is at or just above the origin of the SVC , and the distal port is in the mid to lower SVC . The lung volumes are low , but the lungs are otherwise clear without pneumothorax or effusion . Cardiomegaly is mild .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Proximal port of the right HD catheter is at or above the origin of the SVC , with the distal port in the mid to lower SVC .