Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Midline sternotomy wires , left chest wall pacer with 2 leads extending to the region of the right atrium and right ventricle and prosthetic cardiac valve are again seen . The lungs are clear . No focal consolidation , large effusion or pneumothorax is seen . The cardiomediastinal silhouette appears grossly unchanged allowing for differences in technique . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute findings .