Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate relatively low lung volumes , as before , with no evidence of pneumothorax or pleural effusion . There is prominence of the bilateral hilar vasculature , representing mild congestion with no frank pulonary edema . No focal opacity is identified within the lungs . The cardiomediastinal silhouette is stable in appearance . The patient is status post CABG .
    OUTPUT:
    
Mild pulmonary vascular congestion with no frank pulmonary edema . Otherwise , no acute cardiopulmonary process .