Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are normal . Lungs are clear . There is no pleural effusion or pneumothorax . The left port is unchanged in position with tip projecting over the mid SVC . Previously noted pulmonary nodules on chest CT are not visualized on this study which is expected given their small size . If further surveillance is required , a chest CT is recommended over radiograph .
    OUTPUT:
    
No acute cardiopulmonary process .