Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Dual lead pacer is unchanged with the tips extending into the expected position of the right atrium and right ventricle . No definite signs of pneumonia or CHF . No large effusion or pneumothorax . Heart and mediastinal contours appear stable and normal . Bony structures are intact .
    OUTPUT:
    
No acute intrathoracic process . Pacer unchanged in position .