Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The mediastinal and hilar contours are normal . The heart is mildly enlarged . There is mild unfolding of the thoracic aorta with minimal calcification at the aortic knob . The lungs are hyperexpanded , with mild flattening of the diaphragms , indicative of COPD . Mild blunting of the posterior costophrenic sulcus may suggests small bilateral pleural effusion . Mild pulmonary edema is seen . No consolidation , or pneumothorax is detected . Mild kyphosis is seen in the thoracic spine .
    OUTPUT:
    
COPD . Mild congestive heart failure .