Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild interstitial pulmonary edema has improved substantially . . The cardiomediastinal silhouette is unremarkable . There is moderate S - shaped scoliosis of the thoracic spine . There is no pneumothorax . Left retrocardiac opacity is better characterized on chest CT obtained the same day later .
    OUTPUT:
    
Mild interstitial pulmonary edema is improved from the prior examination . For pre size details please review the CT chest obtained the same date .