Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph on ___ , the right central line has been removed . Otherwise no other significant interval changes . There is mild interstitial pulmonary edema . No evidence of pneumonia , substantial pleural effusions or pneumothorax . Cardiomediastinal silhouette is within normal limits . Degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Stable appearance of mild interstitial pulmonary edema . No evidence of pneumonia .