Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded but clear . The cardiomediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present . Elevation of the left hemidiaphragm is unchanged . Pacer leads terminate in the right atrium and right ventricle .
    OUTPUT:
    
No acute intrathoracic process .