Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged but stable . The mediastinal and hilar contours are unchanged , with calcification of the thoracic aorta present . The pulmonary vascularity is not engorged , and there is no evidence of pulmonary edema . Blunting of the costophrenic angles bilaterally is unchanged compatible with small bilateral pleural effusions . No pneumothorax or focal consolidation is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Unchanged cardiomegaly without congestive heart failure . Trace bilateral pleural effusions .