Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear branching opacities projecting over the right mid and lower lung may be external to the patient . The lung volumes are persistently low , with bilateral fibrotic changes and parenchymal opacities , similar in appearance since the prior study . A right internal jugular approach Swan Ganz catheter is unchanged in position , with tip terminating in the left pulmonary artery . The heart size is stable . There is no pneumothorax or large pleural effusion . An aortic stent graft projecting over the mid abdomen is again noted .
    OUTPUT:
    
Linear branching opacities projecting over the right mid and lower lung are likely external to the patient , but could also represent fissural fluid . In order to resolve this , a repeat radiograph is recommended .