Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Moderate enlargement of the cardiac silhouette is again noted . Atherosclerotic calcifications are seen within the aorta . Mild to moderate pulmonary edema is demonstrated with perihilar haziness and vascular indistinctness , similar to the previous examination . No pleural effusion or pneumothorax is clearly identified . Multilevel degenerative changes are seen throughout the thoracic spine .
    OUTPUT:
    
Mild to moderate pulmonary edema , similar to the previous examination .