Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A Port - A - Cath terminates at the cavoatrial junction . The heart is normal in size . Calcifications are noted along the aortic arch . Comparing to the prior scout view , the cardiac , mediastinal and hilar contours do not appear significantly changed . There is no pleural effusion or pneumothorax . Pulmonary nodules mentioned in the prior CT report are not visible on this study , although a nipple shadow can be visualized on the right . A small quantity of retained contrast within the colon is essentially unchanged . Mild rightward convex curvature centered along the lower thoracic spine with small - to - moderate osteophytes . The bones are probably demineralized to some degree .
    OUTPUT:
    
No evidence of acute disease .