Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low resulting in bronchovascular crowding . There is mild pulmonary vascular congestion , though no overt interstitial edema . No confluent consolidation is identified . There is no pneumothorax . Cardiomediastinal and hilar contours are within normal limits . Mild cardiomegaly is unchanged from prior . Median sternotomy wires from prior CABG appear grossly intact on this frontal chest radiograph .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion , though no overt interstitial edema 2 . Unchanged mild cardiomegaly