Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are improved compared to ___ . There is moderate to severe pulmonary edema with interstitial and alveolar component , improved from prior . There is no pleural effusion or pneumothorax . Moderate cardiomegaly is unchanged .
    OUTPUT:
    
Severe pulmonary edema has slightly improved compared to ___ .