Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart is mildly enlarged . Moderate unfolding of the thoracic aorta appears similar . The mediastinal and hilar contours appear unchanged . Right - sided rib deformities appear stable . Patchy left basilar opacities are compatible with minor atelectasis or scarring with no evidence for superimposed acute disease . There is no pleural effusion or pneumothorax . Small - to - moderate osteophytes are similar along the mid - to - lower thoracic spine .
    OUTPUT:
    
No evidence of acute disease . Mild cardiomegaly . Status post coronary artery bypass graft surgery .