Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . A left pectoral pacemaker device is again noted with the single pacemaker lead terminating in the right ventricle . Patient is status post median sternotomy with multiple mediastinal surgical clips , compatible with prior CABG . The lungs again demonstrated prominent interstitial markings , not significantly changed compared to prior study . No focal opacity is identified . The cardiomediastinal silhouette , hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . No focal opacity to suggest pneumonia . 2 . Stable prominent interstitial markings , possibly due to chronic intersitial lung disease .