Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . There is redemonstration of intact sternotomy wires and mediastinal surgical clips , consistent with prior CABG . Lung volumes are low , resulting in bronchovascular crowding . There is mild pulmonary vascular congestion , without frank interstitial edema . There is no focal consolidation . The heart is mildly enlarged , not significantly changed . The descending thoracic aorta is tortuous , as before . There are no pleural effusions . No pneumothorax is seen . Multilevel degenerative changes of the thoracolumbar spine are noted . A large right breast calcification is unchanged . A surgical clip projects over the upper abdomen on the lateral projection , likely related to prior cholecystectomy given its infrahepatic location on the comparison radiograph .
    OUTPUT:
    
1 . Mild pulmonary vascular congesion , without frank interstitial edema . No focal consolidation . 2 . Unchanged mild cardiomegaly .