Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate midline sternotomy wires and mediastinal clips related to prior CABG . Surgical clips are also noted in the right upper quadrant . The lungs appear clear . No focal consolidation , effusion or pneumothorax seen . Cardiomediastinal silhouette is stable with top normal heart size . Atherosclerotic calcification seen at the aortic knob and descending thoracic aorta . The imaged bony structures appear intact with chronic - appearing deformity of the left proximal humerus . Bilateral AC joint arthropathy is noted .
    OUTPUT:
    
No acute intrathoracic process .