Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy and coronary artery bypass graft surgery . The heart is again mild - to - moderately enlarged . There is no definite pleural effusion or pneumothorax . The lungs appear clear . There is no evidence for free air . This examination shows a prior fracture involving the right proximal humerus , incompletely characterized here but without evidence for change since prior dedicated radiographs from ___ .
    OUTPUT:
    
No evidence of acute disease .