Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is mildly enlarged . There is no focal consolidation . Although no overt pulmonary edema is seen on this chest radiograph , there is septal thickening seen on subsequent spine CT . Minimal upper zones septal thickening is noted . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . No radiographic evidence of pulmonary edema although subsequent spine CT demonstrates septal thickening , suggestive interstitial edema .