Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , resulting in bronchovascular crowding . The heart remains moderately enlarged . There is mild pulmonary vascular congestion and pulmonary edema . No pneumothorax or pleural effusion . A dialysis catheter is present , with the tip in the right atrium . Median sternotomy wires are intact .
    OUTPUT:
    
Mild pulmonary vascular congestion and pulmonary edema .