Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal silhouettes are stable . The cardiac silhouette remains enlarged . The aortic knob is calcified . There is moderate pulmonary edema , increased since the prior study . There is persistent blunting of the right costophrenic angle which may be due to a small pleural effusion . No pneumothorax is seen .
    OUTPUT:
    
Moderate pulmonary edema appears increased since the prior study 2 hours prior .