Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . A central venous catheter has been removed . The heart is mildly enlarged . The aorta is tortuous . The mediastinal and hilar contours appear unchanged . Pleural effusions have resolved . Basilar opacities have also almost fully resolved , although there is still patchy density projecting over the lingula and perhaps the left lower lobe . This could be seen as a residual atelectasis or scarring , although an infectious etiology is difficult to completely exclude in the appropriate setting . Mild degenerative changes are present along the thoracic spine .
    OUTPUT:
    
1 . No evidence of congestive heart failure . 2 . Patchy basilar opacities , which are probably compatible with residual improved atelectasis , which was more extensive on the prior examination , although an infectious etiology can not be completely excluded by this study .