Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy and CABG . Multiple surgical clips are seen overlying the cardiac silhouette and mediastinum . There is a 3 - mm radiopaque density projecting over the left cardiac silhouette on the frontal view only , not well substantiated on the lateral view , may represent post - surgical change / clips , although tooth is not excluded . Consider oblique views for further evaluation . No focal consolidation , pleural effusion , or pneumothorax is seen . The cardiac silhouette is mild - to - moderately enlarged . The aorta is calcified . Patient is status post cardiac valve replacement .
    OUTPUT:
    
3 - mm radiopaque structure projecting over the cardiac silhouette at left lower hemithorax could be post - surgical , although can not exclude tooth ; consider oblique radiograph for further evaluation .