Fig. 3From: Laparoscopic intersphincteric resection with intraoperative radiotherapy using low-energy X-rays for locally advanced ultra-low rectal cancerThe procedure of surgery. a The ligation and excision of the inferior mesenteric artery. b Dissection to levator ani muscle. c The exposed anal canal by sutures. d The applicator was input trans-anally. e The applicator put in tumor bed under the surveillance of laparoscopy. f The prophylactic ileostomyBack to article page