Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Midline sternotomy wires noted . Overlying EKG leads are present . The lungs are clear . There is no focal consolidation , effusion , or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air is seen below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process