Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There has been prior sternotomy and probably coronary artery bypass graft surgery . There is no pleural effusion or pneumothorax . Mild subpleural thickening is unchanged at each lung apex . Pulmonary edema has resolved .
    OUTPUT:
    
No evidence of acute cardiopulmonary disease .