Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Mild cardiomegaly is re - demonstrated . Mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Minimal patchy atelectasis is seen in the lung bases without focal consolidation . No pleural effusion or pneumothorax is demonstrated . Moderate degenerative changes are noted within the thoracic spine .
    OUTPUT:
    
Apart from minimal bibasilar atelectasis , no acute cardiopulmonary abnormality .