Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly and mild pulmonary vascular congestion are unchanged . Patient is post median sternotomy for CABG with intact median sternotomy wires , an unchanged prosthetic valve , and unchanged mediastinal clips . Mediastinal silhouette is normal . The lungs are clear without focal consolidation , effusion , or pneumothorax .
    OUTPUT:
    
1 . No new lung lesion detected . 2 . Unchanged mild cardiomegaly and pulmonary vascular congestion , after CABG and valve replacement .