Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size remains moderately enlarged . There is persistent pulmonary edema , moderate to severe , and slightly worse compared to the prior exam . Probable small bilateral pleural effusions are present . No pneumothorax is identified . Posterior fusion rods and cerclage wires are seen throughout the thoracolumbar spine , unchanged , with an S - shaped scoliosis re - demonstrated .
    OUTPUT:
    
Moderate to severe pulmonary edema , slightly worse compared to the prior exam with small bilateral pleural effusions .