Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Equivocal mild interstitial edema is present , but no focal opacities . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Left lower lobe scarring is stable compared to prior exam . Multiple fractured sternotomy wires are unchanged compared with prior exam . Surgical clips from prior CABG are present .
    OUTPUT:
    
Equivocal intertitial edema might represent mild fluid overload . No evidence of abdominal free air .