Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery and aortic valve replacement . The lungs appear clear . The cardiac , mediastinal and hilar contours appear unchanged . The lungs appear clear . There are no pleural effusions or pneumothorax . Widening and irregularity of the left acromioclavicular joint appears unchanged . The acromiohumeral interval is also narrowed on the left . Small osteophytes are present throughout the thoracic spine , and the bones are likely demineralized to some degree .
    OUTPUT:
    
No evidence of acute disease .