Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left subclavian approach port catheter terminates in the high right atrium . Heart size is normal . Cardiomediastinal silhouette and hilar contours are unchanged . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax . Apparent mild colonic distention is unchanged from the prior study .
    OUTPUT:
    
No acute cardiopulmonary abnormality .