Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph obtained . A left chest wall AICD device is again noted with leads extending into the right atrium and right ventricle . A right IJ central venous catheter is seen with its tip in the expected location of the cavoatrial junction . Lung volumes are low though lungs appear clear . No large effusions . No definite hydropneumothorax . The pulmonary vasculature appears normal . Lung volumes are low . Bony structures are intact .
    OUTPUT:
    
No signs of CHF , pneumonia , or effusion . Right IJ central venous catheter with tip at the cavoatrial junction .