Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left pacemaker ends with leads in the right atrium and right ventricle . The cardiomediastinal silhouette and hila are normal . There is no pleural effusion and no pneumothorax . There is no focal pulmonary opacity . The thoracic aorta is tortuous with aortic arch calcifications .
    OUTPUT:
    
No acute intrathoracic process .