Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly to moderately enlarged with a left ventricular configuration . The patient is status post coronary artery bypass graft surgery . The aortic arch is calcified . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Similar mild relative elevation of the right hemidiaphragm is noted . Healing right posterolateral fourth , fifth and sixth , and probably seventh rib fractures are noted . The degree of displacement is not significantly changed . Slight interval sclerosis suggesting callus is seen compatible with ongoing healing process .
    OUTPUT:
    
No evidence of acute disease .