Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Post - CABG changes are present in the form of sternotomy wires and mediastinal clips . Rib resected changes are present in upper posterior lateral right rib . A coronary artery stent is present . The heart size is at the upper limits of normal . Calcified atherosclerotic disease is seen at the aortic knob . The lungs are hyperexpanded but clear . There is no pleural effusion or pneumothorax . Mild degenerative changes are present in the spine .
    OUTPUT:
    
Post - CABG changes and stent , but no acute pulmonary process .