Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires again noted . Prosthetic aortic valve noted . The heart and mediastinal contours are stable from prior chest radiograph . The lungs are clear . No large effusion or pneumothorax . Bony structures are intact .
    OUTPUT:
    
No acute findings . Please refer to same - day CT torso for further details .