Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is at the upper limits of normal . The mediastinal and hilar contours are within normal limits . The lung volumes are low , but there is no lobar consolidation . The pulmonary vascularity is mildly prominent . Subtle blunting of the costophrenic angles may represent trace pleural effusions although there are no definite pleural effusions . There is no pneumothorax .
    OUTPUT:
    
No evidence of pneumonia . Mild pulmonary vascular prominence .