Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph obtained . Midline sternotomy wires and mediastinal clips are again noted . There is no definite sign of pneumonia or CHF . Prominent costochondral calcification likely accounts for the hyperdensity adjacent to the right heart border . There is no large effusion or pneumothorax . The bony structures are intact . Heart size appears within normal limits .
    OUTPUT:
    
No acute intrathoracic process .