Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate midline sternotomy wires and mediastinal clips . The heart remains top - normal in size . The aorta is mildly calcified . This been no significant change from prior exam with mild coarsening of interstitial markings which could reflect chronic lung disease possibly emphysema . There is no large effusion or pneumothorax . No signs of pneumonia . Imaged osseous structures appear intact .
    OUTPUT:
    
No acute findings .