Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are unremarkable . There is a left anterior chest wall implanted single lead ICD with appropriate positioning of lead in expected location of the right ventricle . Lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process .