Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left - sided hemodialysis catheter which appears unchanged . The patient is status post coronary artery bypass graft surgery . The heart is at the upper limits of normal size . The mediastinal and hilar contours appear unchanged . The aorta is diffusely calcified . Mild hyperinflation is present . There is no definite pleural effusion or pneumothorax . The lungs appear clear . The bones are probably demineralized to some degree with similar mild degenerative changes along the mid thoracic spine .
    OUTPUT:
    
No evidence of acute disease .