Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal and mediastinal contours are stable . Calcification of the aortic knob is similar to prior . Upper lung fibrotic changes are similar to prior . Mild blunting of the posterior costophrenic angles are consistent with small bilateral pleural effusions . No focal consolidation or pneumothorax .
    OUTPUT:
    
Small bilateral pleural effusions . No focal consolidation or pneumothorax .