Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . Lungs are clear . No pleural effusion or pneumothorax is seen . Mild pulmonary vascular engorgement . Pulmonary edema is markedly improved from the prior examination .
    OUTPUT:
    
No pneumonia . Pulmonary edema markedly improved from ___ .