Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs , without pleural effusion or pneumothorax . The cardiac silhouette and mediastinal contours are normal . There are post-surgical changes of CABG .
    OUTPUT:
    
No acute chest abnormality . These findings were called to the practice of Dr . ___ at 2 p .m .