Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly to moderately enlarged . Mediastinal contours are relatively unchanged , with mild calcification of the thoracic aorta . Mild interstitial pulmonary edema is present , similar compared to the prior exam with small bilateral pleural effusions . Clips are noted projecting over the left chest wall . There are degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild interstitial pulmonary edema and small bilateral pleural effusions , relatively similar compared to the prior exam .