Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest were obtained . Leads of a left chest wall generator pack terminate in the right atrium and right ventricle . Heart size and cardiomediastinal contours are normal . The lungs are clear except for very minimal bibasilar linear atelectasis . No edema , pleural effusion , or pneumothorax .
    OUTPUT:
    
No evidence of pulmonary edema .