Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left subclavian central venous catheter is seen terminating in the region of the mid SVC without evidence of pneumothorax . Prominence of the right hilum may relate to underlying vascular congestion , but correlate with blood return from the central catheter to exclude arterial puncture . No large pleural effusion is seen . The cardiac silhouette is mildly enlarged . The aorta is calcified .
    OUTPUT:
    
Left subclavian central venous catheter is seen terminating in the region of the mid SVC without evidence of pneumothorax . Prominence of the right hilum may relate to underlying vascular congestion , but correlate with blood return from the central catheter to exclude arterial puncture .