Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . Clips are noted in the upper abdomen . Two epicardial pacing wires are present . The right CP angle is excluded partially . Lungs appear clear without signs of CHF or pneumonia . No large effusion or pneumothorax seen . Heart size is normal . Mediastinal contour is unremarkable . Bony structures are intact .
    OUTPUT:
    
No acute intrathoracic process .