Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Re-demonstration of median sternotomy wires and surgical suture material over the mediastinum is again noted . There is no evidence of pneumothorax or pleural effusions . The heart size is grossly stable . Old healed right rib fractures are again noted . There is no evidence of pneumoperitoneum .
    OUTPUT:
    
No acute intrathoracic process .