Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . As compared to the prior examination , there has been an interval increase in the degree of prominence of the interstitial markings , compatible with an acute on chronic process . There is no lobar consolidation , pleural effusion or pneumothorax identified . The patient is status post CABG and sternotomy wires are intact and well aligned . Chronic , mild cardiomegaly is present .
    OUTPUT:
    
1 . Increased prominence of interstitial markings , compatible with an acute process overlying the patient 's known chronic pulmonary fibrosis , possibly secondary to vascular congestion versus an acute inflammatory process . A diffuse overlying infectious process is felt to be less likely . 2 . Status post CABG with chronic mild cardiomegaly .