Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The aorta shows mild unfolding , as before . The heart is normal in size . There is no mediastinal or hilar lymphadenopathy . There is no pneumothorax . Slight new blunting of each costophrenic sulcus potentially indicates trace effusions , but if confirmed , quite small . Moderate degenerative changes are similar along the mid thoracic spine .
    OUTPUT:
    
No evidence of acute disease aside from perhaps trace pleural effusions .