Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right - sided central venous catheter tip terminates at the cavoatrial junction . The heart size is within normal limits . The mediastinal contours demonstrate a tortuous aorta with calcified atherosclerotic disease of the aortic knob . There is no mediastinal widening . The lung volumes are low , exaggerating the pulmonary vascular congestion , but there is no airspace consolidation or evidence of failure . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes and vascular congestion .