Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate enlargement of the cardiac silhouette is present . The aorta is tortuous and calcified . There are increased interstitial markings bilaterally compatible with interstitial edema . No focal consolidation , pleural effusion or pneumothorax is present . There are multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild interstitial pulmonary edema .